Botany Buddy

Having grown up in Northwest Missouri, where the winter winds of the plains from Iowa, Nebraska and Kansas converge on the bluffs of the Missouri River like three tornadoes of ice converging into one, I learned to appreciate anything in the vegetation that glowed with warmth.  In the surrounding landscape it was the golden tones of the fields laying fallow, especially when they sparkled from the frost glistening in the sun.  In the sky it was the amazing sunsets as far as the eye can see even after a long day of nothing but cold blue skies that seemed as if you were peering into ice.  On the highways it was the oasis that always formed about a half mile ahead of you on the road and what appeared to be steam rising from the asphalt that was the only thing absorbing the sun since there wasn’t a tree in sight.  The warmest memories of all were of course inside, with the smell of what some would call “farm food”.  The pot roast on Sundays, fried chicken on Saturdays, and of course spaghetti on Wednesdays.

However, when you arrived at someone’s home, it was usually one of the coldest sites of all.  In the midst of the pastures would be the perfectly green lawn.  The houses would always be white, to not show the dirt blowing off the fields and gravel roads, and they would be perfectly adorned with a straight row of yews, or junipers tortuously pruned into a shape they were obviously not supposed to be.  Green it would be, even in the evergreens with hedgerows of White Pine, Junipers, or Arborvitae perfectly marking the borders of the lawn.  Someone might occasionally get crazy and throw in a prized Blue Spruce (assured to have lights at Christmas), but when you needed that blue the most, it always seemed to look green if not brown from the burn of the winter winds. 

Quickly in my career as a designer I had to overcome this hurdle.  Being a plantsman first this wasn’t hard.  I grew up in nurseries, so my challenge as a designer wasn’t finding plants to use, it was learning how to restrain my pallet.  One thing I learned early on was that it was hardest to make a landscape look great in winter.  However, if you could accomplish that, making it interesting the rest of the year was a piece of cake.  I am not talking about using all kinds of colorful evergreens that look like they came out of a crayon box.  I love interesting conifers, but not when the color overpowers the essence of the plant.  So in this post I thought I would focus on plants with interesting barks.  Conifers are too easy.  The following plants are some of my favorites, but by no means all that I use.  They are also a mix of native and non-native varieties, but none should be invasive.  What they do have in common is a sense of warmth and life they can invoke in the dead of winter.

Betula (Birch):  Betula nigra (River Birch) is probably the most common.  There are several varieties of the species including ‘heritage’.  All have the indicative papery tan exfoliating bark.  They also are usually multi-trunked with a few large leaders reaching for the warmth of the sun and small horizontal branches wisping out from the sides . The vertical structure of the trunk makes it move in the wind and provides a nice contrast to the broad, heavy and  horizontal branching of  Spruce and Pine.  My favorite Birch is actually Betula populfolia ‘Whitespire” (Japanese Whitespire Birch).  It is a white or “paper” barked variety that has proven to be borer resistant.  The parent plant is now almost seventy-years old and remains borer free.

Cornus sericea (Red Twig Dogwood):  This is one of the few shrubs with colorful bark in the winter.  It is also native to much of the United States.  This plant has a bright red twig in winter that can be seen from a distance but isn’t overpowering.  The vertical branching habit makes it feel more like a grass or thicket plant than a shrub, but the fullness makes it work well for a border or foundation plant.  The plants are a lush green in summer with a nice white flower and prolific white berries birds love.  Along with this you must include Cornus alba (Variegated Red Twig Dogwood).  It is very similar to Conus sericea, except it has a variegated leaf.  This species can be prone to anthracnose but the variety Cornus alba “Ivory Halo” seems to be disease resistant, and keeps a more compact form than other varieties.

Hydrangea quercifolia (Oakleaf Hydrangea), and Hydrangea anomala var. petiolaris (Climbing Hydrangea):  Both of these plants have a birch like bark that is exquisite in winter.  The Oakleaf Hydrangea looks great against evergreens or lawns, and another interesting feature is that if you leave the flowers on they will dry in place all winter.  This almost makes it look like it is in bloom.  Climbing Hydrangea is wonderful on a fence, and especially brick walls.  The bark really pops out against brick.  It also has a very fibrous attaching root that give it an almost Gothic feel compared to other vines.  It is also a self attaching vine with makes it even nicer.

Physocarpus opulifolius (Ninebark):  There are two predominate varieties of this plant ‘Diablo’, a purple leaved variety, and ‘Dart’s Gold’a yellowish leaved variety.  Both have a Birch like texture in winter.  If left alone they grow very vertical and develop a thick trunk like structure.  They seem to max out around six feet in height and four feet in width.  This makes them great to tuck behind low growing evergreens and if left natural will look almost like a very small Birch.  Ninebarks are extremely hardy, fairly fast growing, and drought tolerant.

 

Acer palmatum ‘Sangu Kaku’ (Coral Bark Maple):  This plant his a vivid pinkish coral bark in winter.  It can almost take on an orangish tone.  The tree itself is very delicate and rarely exceeds twelve feet in height.  It has a ferny maple leaf and wispy texture.  It does not develop the distinguished branching habit that other Japanese Maples do, so it does look good as a stand alone specimen.  However, it is fantastic tucked into evergreens or against a foundation.  The only downfall to this plant is that it is prone to winter kill.  Winter watering will cut down on this, but expect it to develop some dead wood in winter that will need to be removed in the spring.

 

Lagerstoemia indica (Crepe Myrtle):  There are dozens of varieties of this plant in production.  It comes in all sorts of colors and sizes.  The trunks are usually clumped and have a blotchy exfoliating bark, rather than papery bark like a birch.  Many people think of them as trashy because they drop flowers and seed pods constantly and sucker which makes them require pruning to keep nice trunks.  Regardless, with all of that, it sure looks good most of the time and especially with its late summer bloom and winter bark.  Both features shine at times when other plants are lackluster.  On top of that it can survive the abuse of just about any parking lot in the south.

 

Acer griseum (Paper Bark Maple):  This is a very underused and overlooked tree.  It averages about 25-30 feet in height, so it can be used for shade on a patio, a specimen in the lawn without killing out the grass, or as an ornamental in a foundation planting.  It is not overly showy.  It doesn’t have an amazing flower or incredible fall color, but it is classy.  The fall color is nice, and the foliage is very clean and green in the summer, but this plant is sought for the bark.  It is a favorite of collectors.  Sometimes I compare plant collectors to book collectors.  If I were to compare it to a book you just had to have on your shelf it would be Catcher in The Rye.  It is not a huge tree, but does she rextremely well written, reliable as a recommendation, full of inspiration and bound to create memories.

Platanus x acerifolia (London Plane Tree) and Platanus occidentalis (American Sycamore):  These are two of the great majestic trees of urban parks everywhere.  They are messy, and drop limbs, leaves, and seeds all of the time, but the mess is worth it.  They are extremely hardy, pollution and drought tolerant, and capable of living in swamps.  There is not much this plant can’t take, but what it gives is irreplaceable.  The bark of the London Planetree exfoliates on the lower portions of the trunk.  The American Sycamore is reversed and exfoliates on the upper trunk and branches.  Both create very tall and open canopies making them ideal for street trees.  As their branches cross the road they create the feeling of a nave.  Given the space of a park, where they can be 100 feet from the next tree, they can form a cathedral unto themselves with branches hanging all the way to the ground 60-80′ wide.  When it comes to habit, they can rival the grandest of any Oak, but what makes them stand our is that glorious white of the bark exploding in winter.

I am sure I have left out plenty of others, like some of the Poplars, Tree Lilac, Ironwood, and countless others.  After all, I need to leave something for later.  I am already craving the cold walks amongst the Sycamores in the valley through the thick fog of winter, and winter isn’t even here yet.  I need to leave something for January when we are really sick of winter and dreaming of spring.  Hopefully these will just give you some motivation and help you think outside of the box of the evergreen hedge.  There are lots of options for winter interest when it comes to evergreens and even grasses, but when it comes to design, working with bark requires a subtlety the invokes class.  Most importantly since barks encase the heart of the tree they also exude the warmth of their essence, something we are all about to need.

Of course, all of the trees and shrubs profiled in this post may be found in Botany Buddy’s Tree and Shrub Finder for the iPhone and iPod Touch.

It’s that time of year again.  I’ve cleaned out the tube bird feeders, hung a couple new suet feeders, and I have already had on ripped down by the bear.  I always like to wait until winter is really coming to start feeding.  Primarily because I like to let the birds “Free Range” on wild flower seeds and the summer fruits and berries in the garden.  I like the thought of them helping with the natural cycle of scarifying and dispersing the seeds the way nature intended.  I also like not having the bears visit everyday, especially with my daughter playing outside by herself all summer.  This is a luxury we have living on a rural mountainside that we didn’t have on an urban street corner.  Not that the bears are the threat that some of our neighbors were.  They are more akin to urban raccoons that scavenge their way around on garbage day and pilfer your bird feeders.

Being in a natural setting is a blessing in so many ways, but one of the greatest is the flora for the fauna that already exists naturally. There are hoards of native shrubs that adorn our woods and one of the reasons is that the birds love them so much and help to spread their seed.  This time of year really makes me appreciate where we are, but it also reminds me of our urban garden where we worked to bring native varieties into the garden to bring the birds with them.  One of our prouder moments was when are daughter chose “peepepper” as one of her first words.  He was the first neighbor we got to know on the mountain.  He lived in the four story highrise in the woods next door that largely resembles a dead white pine.  Of course his name eventually evolved to woodpecker, and now she boast a better knowledge of the neighbirds than myself.  Of course this started with books, but my wife’s iBird app has helped as well.

So as I see the return of the flocks, I have been wanting to spread the joy of the season and share a list of plants that would help bring some good neighbirds to you.  I am going to limit this list to natives that transfer well to an urban setting.  However, there are plenty of hybrids and commercial varieties that do the job too.  I thought I would start here because I like to save those varieties for places where natives just won’t grow.  Going native first is one of the first rules of sustainability.  What I have chosen are the five palnt families (Genus) with the widest selection of bird friendly varieties I could find.  This is by no means an exhaustive list, but it should give you a great place to start with your plant and bird searches. 

Pinus (Pine):  There are dozens of native pines that make great trees for birds.  Pinus Strobus (Eastern White Pine) is the most commonly planted in the United States, but for smaller varieties in residential gardens some other native options include Pinus aristata (Bristlecone Pine), Pinus banksiana (Jack Pine),  Pinus Bugeana (Lacebark Pine), Pinus Resinosa (Red Pine), and Pinus monophylla (Pinyon Pine).  These pines are all more moderate in size than the White Pine, but still maintain a natural feel in a formal landscape.  This makes them ideal for urban or residential situations. 

Pines provide food for birds  in a variety of ways.  The cones of pines open to release as many as 12,000 seeds per pound, usually in winter when the other smaller seeds of wildflowers have been eaten.  The bark also harbors lots of insects that make it a favorite for woodpeckers. As the interior branches shed they provide copious amounts of small twigs and needles to build nests, and their evergreen needles provide protections from the cold winter winds.

Juniperus (Juniper):  Juniperus communis (Common Juniper), Juniperus monosperma (Oneseed Juniper), Juniperus occidentalis (Western Juniper), Juniperus scopularum (Rocky Mountain Juniper) and Juniperus virginiana (Eastern Red Cedar) are the most common native varieties in the continental United States.  Between these five you can find a native Juniper almost anywhere in North America.  All of these varieties have been cultivated into varieties for landscape use that can be safely used without worrying about reseeding invasive offspring.  If seed stock does emerge it will come out as one of the native varieties.  There are some hybridized varieties that could revert to something else, so if trying to stay native stick to cultivated or native varieties only.  

Junipers produce berries throughout summer, winter, and fall that provide a great source of food.  They also have a nice evergreen shell that provides protection from the wind.  Junipers provide great cover from prey. As the growth on the interior of the plant sheds it dries and stays in place becoming extremely prickly.  This makes it less desirable for thin furred animals such opossum and weasels to come after the nests.

Viburnums:  Viburnums are a favorite of landscape designers because they are extremely hardy  They also produce nice flowers, foliage and berries and provide some great fall color.  Some are even evergreen, and the flowers are often extremely fragrant.  However, they are usually somewhat of an unknown to beginning gardeners or casual retail nursery shoppers.  Native species include Viburnum dentatum (Chicago Luster Viburnum), Viburnum prunifolium (Blackhaw Viburnum), Viburnum rufidulum (Rusty Blackhaw Viburnum), and Viburnum trilobum (American Cranberry Viburnum),  All of these plants have abundant flowers and berries and can be kept as large shrubs or small trees in any landscape.  The birds love them for the berries and their height is achieved with fairly small horizontal branches that are great for perching but don’t hold the weight of predators making them a nice place for birds to hang out.  There are also many cultivated and hybridized non-native varieties that are not invasive.  If for some reason a native option doesn’t work for you, I would not hesitate to explore those options.

Cornus (Dogwood):  Everyone thinks of Dogwoods as the spring flowering tree, however they also come in some naturalizing and shrub forms as well.  Cornus florida (Flowering Dogwood) is a sentimental favorite for gardeners with the pink and white flowers at Easterand red berries in the fall.  However Cornus racemosa (Gray Dogwood) makes a great naturalizing thicket of about 12-15 feet and produces a nice white flower in May and June and a waxy white berry birds love.  Other varieties include Cornus alternifolia (Pagoda Dogwood), Cornus drummundii (Rough-leaved Dogwood), Cornus nuttallii (Pacific Dogwood), and Cornus sericea (Red Twig Dogwood).  The Rough-leaved and Red Twig Dogwoods provide a shrub form and the red twigs provide great winter interest.  All of these plants have wonderful landscape value, as well as make great naturalizers.  They all have reliable berries for the birds, provide nesting habitat, and add aesthetic value to add to any garden.

Prunus (Cherry):  The Prunus (Cherry) family covers more than the cherries we eat or the flowering trees we see in spring.  There several shrub forms and not as showy trees that can add subtle accents to the landscape, as well as habitat and fodder for birds.  Prunus virginiana (Chokecherry) comes in several forms and varieties and is a great alternative to some of the hybrid and grafted tree-form varieties.  Prunus caroliniana (Carolina Cherrylaurel) and its Asian counterpart Prunus lauroceasus (Cherry Laurel) make great evergreen shrubs, providing both protection and berries as well as a nice evergreen foliage for the landscape.  Prunuis subhirtella (Weeping cherry) is a nice pink flowering native that drops small berries mid summer. Prunus besseyi (Sand Cherry) is a great naturalizing shrub with small white flowers and black berries that are low enough to provide fodder for foraging birds like pheasant and turkey.  Finally, Prunus americana (Wild Plum) is probably one of the most common fruit bearing trees and can be found in almost all states east of the Rockies.  Of course there are other varieties as well, but as a family, Prunus may provide more food for the birds this continent than any other plant family.

There are countless other plants and plant families that I could include in this list, and look for more to come.  For now, these families provide the most variety in terms of native trees and shrubs to bring in birds, and they adapt well to the urban and residential landscape.  All of these plants look great, when used in the right place at the right time.  But when it comes down to it nothing brings out the beauty of a plant better than when it gets to do what it was born to do….be a part of nature. 

Of course, all of the trees and shrubs profiled in this post may be found in Botany Buddy’s Tree and Shrub Finder for the iPhone and iPod Touch.

Such a big word sustainability is.  Everyone is trying to define it.  Everyone says they can provide it, and most think it is something you create or buy rather than something that you do indefinitely.  For the last five years I worked in sustainable development.  I raced everyday to repair the forest’s edge and to get the wild flowers to grow before some salesman decided “sustainability” didn’t sell.  I fought for the budgets and screamed on behalf of the trees and the workers who protected and cared for them.  Well for something to be sustainable it cannot be a race, or a competition it has to be a collaborative effort from the bottom up.  To use a dirty word, it is community organizing with nature as a full fledged participant.  Sustain is a verb and you can’t turn it into a noun by claiming to give it ability and using it as something to be sold or proffited from.  It is an effort, behavior, and way of life that for it to be successful requires participation of everone involved and recognition of everything involved.  It has to be adaptable and evolutionary just like nature, because if any part of the system changes it impacts the whole.

For the last five years I have spent my life designing landscapes, management plans, and financial plans for “sustainable developments” in the mountains of Western North Carolina, Virginia, and Northern Georgia.  Prior to that I spent fifteen years designing “sustainable” gardens in urban parts of Kansas City.  In both cases the trick was always to design a plan that met the needs and desires of the owners and invoked a management plant that was within their means.  Sustainability is always completely relative to those who have to do the sustaining.  For a plan to be sustainable it has to be so by the owner, because once we have interfered with nature, it can never be sustainable by itself.  By disrupting an environment we assume ownership and have to become stewards. It always felt good to see a plan reach the second and third year, and to see that maintenance drop off.  However, about five years ago I started to see the lifestyles of those clients drop off and what was once sustainable to them, was beginning to be so no more.

I have always said that the difference between a garden and a landscape is that the garden requires a gardener.  A landscape may not require a gardener, but it does require a steward.  This is the paradox of the sustainable landscape.  Once nature is disrupted it can no longer be sustainable (self-sustaining) in the truest sense.  It has to be sustained unless it can be returned to the natural state.  Once you have destroyed the natural cycles, nature can never completely return to what it was.  All we can do is create a new eco-system, and help it get to where it can thrive on its own.  Hopefully we can do it in a way that won’t disrupt the lifecycle of surrounding ecosystems and set it in another wrong course.  The bottom line in all of this is once we have broken it we own it.  We suddenly have to maintain it or repair it in a way that it can maintian itself.  Suddenly sustainability is no longer about sustaining the beauty around us, but rather a race to stop the damage we have done.  Once the decision is made and the damage is done all of the sudden sustainability or more precise, sustaining starts and the cycle set in motion may never end.

In reality if we weren’t doing things that weren’t sustainable, we wouldn’t have a need for sustainability.  So rather than start this vicious cycle, why don’t we start with conservation and protection.  If there is any lesson we should all know as people it is that we are not good at creating sustainable systems for ourselves.  Be it justice, economics, agriculture health care or common respect for each other as human beings, we don’t have a great track record at doing this.  So what makes us think we would be better at sustaining nature than it would itself.  I have been ranting a lot lately about having to know nature to love it.  That it because understanding is where sustainability starts.  Rather than everyone running around claiming to have the right answers, maybe we need to start with just trying to gain a better understanding of the world around us.  Maybe then we will stop creating environments that need sustained and start loving what we have been given for what it is.

It was another beautiful fall morning in the Southern Appalachians, and as I was driving my daughter to school I couldn’t help but be overwhelmed by the clouds in the valleys, the orange hue of fall on the mountains and the vivid colors that were taking over the roadsides.   Escaping in all of natures beauty was perfect for taking my mind off the Radio Disney that was poisoning my ears.  However, just as the Radio Disney was creeping in and squeezing my brain like a vice, those colors on the roadsides did as well.  All of the sudden I realized I was missing the beautiful tones of the White Oaks and Sourwoods against the Hemlocks for the bright red of the Burning Bush against the Honesuckle and Maiden Grass.  As for that beautiful American Holly, I couldn’t even tell what it was for the Wisteria and English Ivy that had taken it over.  By the time I was headed back to the house, what started out as a beautiful relaxing drive was grinding me just as much as that Radio Disney even though I had put on Abbey Road.

That brings me to this.  It always amazes me how as designers and gardeners we are always looking for the next best thing and failing to recognize and reveal the essence of the environment we are in.  In our desire to make our space more perfect, some of the greatest damage to our environment has been done by some of the greatest minds our industry has known.  Here is Asheville the Oriental Bittersweet, Japanese Wisteria, Tree of Heaven, and English Ivy that are taking over our national parks were all the gifts of Frederick Law Olmstead.  In Kansas City it was Arnold’s Red Honeysuckle that George Kessler brought us with America Beautifulc movement.  All of these people have good intentions, but in todays world we can find the information we need to plant responsibly and still have plenty of great options from a  design standpoint.

There are thousands of invasive plants out there, both exotic and native that when taken out of their native habitat can do incredible harm to the environment.  This list is limited to the ten that I see most commonly used and pushed by the horticulture industry.  These are plants that are known to be doing damage to our native habitat and continue to be sold every day.  Why do they do it?  Because of demand from customers (hobbiests and professionals) that don’t know better, existing inventories (that keep getting replenished) and the ease of growing these plant in production and in one’s yard.  When I set out to create Botany Buddy one of my goals was to get this information out, and not only make it accessible, but make available in your pocket at any time.  This list is a fraction of the information consumers need but these plants account for a huge amount of the damage being done.

Ten Commonly Planted Invasive Woody Plants

Burning Bush / Euonymous alatus  This is one of the most popular fall color shrubs in production.  It’s vivid red fall color gives it the name.  It is tolerant of drought, ignorant pruning with gas shears extreme cold and keeps on growing.  As a result it has become a favorite in commercial landscapes and roadside plantings.  In zones 6 and up, the little red berry it gets is extremely viable and is spread by the birds that eat it.  Typically a simple hedge planting in the wrong location can spread to a radius of one mile within ten years.  The native plants they displace include Mountain Laurel, Rhododendron, and Hydrangea.  Which would you rather have?

 

Bradford Pear / Pyrus calleryana  I can remember when this plant came out in the 80’s and was marketed as “America’s Most Poplular Tree” for the fall color, spring flower, nice tight shape, hardiness, and its fruitlessness.  Besides being prone to ice and wind damage due to that “desireable” branching habit, this tree turned out to be anything but fruitless.  The small crabapple sized berries are a favorite of birds and so is its branching habit.  As a result these can now be found in pastures and waterways throughout zones 6 and up.  Even worse in waterways they are replacing canopy producing trees and raising water temperatures which hurts species such as the Southern Appalachian Brook Trout.

Japanese Wisteria / Wisteria floribunda  Introduced as a favorite for Japanese gardens, its agreesive vining habit will take over anywhere zone 5 and below if left unattended.  It can reproduce by rooting if the brances touch the ground, and in zones 7 and up has vibable seeds.  It is commonly found in Eastern forests along the Blue Ridge  Parkway at elevations between 2500 and 4000 feet.  The populations are highest around cities and especially the Biltmore Estate.  While the flowers are beautiful with the Dogwoods they can girdle and kill any tree they wrap around.  There is a native variety that is finally making it into production.

Japanese Spirea / Spiraea japonica  ‘Norman’ or ‘Anthony Waterer’ is the variety that is the main culpret as it spreads by root as well as seed.  There are many varieties that are supposedly not invasive.  However, all of them have the ability to revert and spread by seed.  One positive is that it is not a favorite of birds becasue the seed is so small.  It has to fall and touch the ground to germinate so some of those parking lot plantings might not be doing as much damage as we think.  If it does escape.  One single stem of this plant can flower and germinate into a colony ten feet wide two years.  This plant is destroying our native wildflowers throughout the Southeast.

Japanese Barberry / Berberis thunbergii  This plant is most commonly planted at your local McDonalds due to its attractiveness with the golden arches.  It is just an invasive as the chain in zones five and up and is as bad for the environment as their food is for you.  The plant aesthetically is probably as numbing to your palet as their food is to your culinary sophistication.  The beautiful red berry entices the birds like a toy in a Happy Meal entices my child.  The red leaves hypnotize the plant’s buyers from a distance like the arches that can be seen from a mile away.  As a result this plant litters our forests like McDonalds’ wrappers do our cities.

 

Empress Tree / Paulownia tomentosa This plant is not commony found in nurseries, but it is pushed by many major seed catalogs for its ability to grow ten feet a year.  I would think that would tell you something in itself, but people want instant results and that pretty purple flower in May and June.  The tree has nice leaves and a habit like a Catalpa, but most of the year its appearance is cluttered by the seed pods that will spread anywhere they can find soil and light.  This is one of the few invasive trees that wasn’t brought here for planting.  Instead, before there were packing peanuts there were Paulownia!  Before there was styrofoam the seed pods of this plant were used in wooded crates from Asia as packing peanuts, and the trees can now be found along all of the railways throughout the United States.  Unfortunately one of the first places those rails went was our national parks.

English Ivy/ Hedera helix  What would a formal garden be without it?  It would be a lot more interesting and a lot more sustainable.  It is defnitely time to give this plant a rest.  It should really only be used in the concrete jungle and even then limited.  There are many more intersting alternatives live Pachysandra or an all out perennial bed.  This vine spreads by root and can climb in the forest greatly weakending larger trees if not contained.  When allowed to reach heights of 20 and 30 feet it will often start to seed and spread even more.  I haven’t used this plant in over five years, and to be honest with you, my designs, clients, and environment are far better off for it.

Butterfly Bush / Buddleia davidii  This plant is finally starting to make people’s radar as an invasive.  It is one of those that has exploded in variety and popularity over the last fifteen years.  It is still new enough the effects are just starting to take root.  However, in all zones, if these seed falls into a wetland or moist area and gets temperatures above seventy degrees for over a couple weeks, it will germiante and spread.  It is most commonly a problem in warmer mountain and piedmont areas thought the US where moisture running off the mountains provides just this environment.  The seed is a favorite of finches so they move the seed form the plant to summer wilflower patches that share ideal growing conditions.

Scotch Broom / Cytisus scoparius  This plant is to the West and coastal areas what Japanese Spirea is to the rest of the country.  It has naturalized throughout most of the West Coast.  The low growing bushy habit takes out everything in its way, and it has beautiful flowers and evergreen foliage to boot!  This makes it a favorite of growers.  There are hundreds of varieties in production, and the tollerance to drought and long bloom time make it a favorite of retailers.  As for all those little California and coastal wildflowers look out!  This one is eating them all up.

 

Norway Maple / Acer platanoides  This is probably the most planted invasive tree, but most unknown to be invasive.  This plant had been quietly taking over Poplar forests for the last hundred years.  Poplar being fast growing, straight  and light is now the most popular trim lumber.  It is often selectively harvested leaving just enough light for the seeds of the Norway Maple to germinate and establish quickly.  With yellow fall color like a Poplar’s, from a distance youwould never know the forest had changed, but the natural progression of the forest has.  As the Poplars get older, weaker ones are supposed to fall and thin over time allowing room for grand Oaks to establish along with the legacy surviors.  However, the  fast wide growing maples stunt the forest progression  making 100 year old forests look like they are only thirty years old.

This is just a start and I could go on forever, but these are the ones that I see go out on trucks every day and find hiking in nature every day.  Some people take it personally against invasives and think of the plants as “Evil” or “Bad”.  A wise 90 year old piano teacher once told me…”A weed is nothing more than a flower in the wrong place at the wrong time.”  What we have to remember is that the weed didn’t put itself there.  Either we did, or we created the conditions for it to get there.  There is no greater pervention to the spread of invasive plants than knowledge and education, and both of those are far cheaper than trying to repair the damage that they do.

All of the plants in this profile can be found in Botany Buddy’s Tree and Shrub Finder, along with more photos and information including the native habitats, native ranges, and  cutural information.  Botany Buddy currently profiles 1300 trees and shrubs and our library is constantly growing to bring you the valuable information like this that you need.

Get to the root of the issues!

There are two main things to consider when choosing a plant to purchase. First, choosing the right plant for the right spot, and second selecting a quality plant to buy. As for choosing the right plant for the spot, there’s an app for that!  Botany Buddy’s tree and shrub finder was designed specifically for this purpose. As for choosing a quality plant to purchase, this post for that.

Trees and shrubs come packaged for sale in three main forms: containerized, balled and burlapped and bare root.  The best of these to buy will depend on what you are using them for. Containerized trees and shrubs are ideal for planting in prepared beds, individual holes in the ground, or in pots. Balled and burlapped plants are best when planting in beds, or individual holes in the grounds, but do not do as well in containers.  Bare root plants do best in pots or directly in unprepared ground. Larger bare root plants (shrubs over 6″ tall or trees over 12″ tall) perform best if planted in pots in the spring and allowed to root out before planting into the ground later in the season.

There are several factors to look at when choosing a plant to purchase depending on the packaging.

1.) Bare root plants can never be allowed to have the roots dry out. Healthy bare root plants will have small white fibrous roots it they have been properly cared for. If they have dried out they may be brown but still be viable. This can be determined by scratching the root to see if it is green or white underneath. If it is, pruning them back by 20% and immediatelysoaking them in water and root stimulator (Vitamin B1) can cause the roots to sprout new growth. If the roots are dry and brittle or soft and smooshy don’t buy the plant.  The roots are probablydead.

It is also important that bare root plants have an equal or greater amount of root growth than plant growth.  Pruning back the top can solve this but it not done correctly may hurt the plant’s eventual shape and removes valuable nutrients stored in the bark that can be used for establishment.

2.) Container plants should never be allowed to dry out. Whenever purchasing a containerized plant, remove the pot and inspect the roots. The rules on healthy roots are the same as for bare roots. If the plants have small white fibrous roots they have been properly cared for. If they have dried out they may be brown but still be viable. Just scratch the root to see if it is green or white underneath.  If it is, score the roots and rough up the ball when planting.  With immediate watering they can be caused to resprout.  However it typically takes an entire growing season for the roots to get back to a really healthy state.  This can greatly affect survival and slow down growth.  The energy stored in the branches of a plant can keep it look completely healthy for an entire season even if the root system is dead.  This is why you should always inspect the roots.

There are also signs to look for that you should completely avoid. Some plants may have been left in a pot so long that the roots will have girdled themselves. They will have circled around the pot so many times that they are strangling themselves and will eventually cut off their own circulation.  Another symptom of being in a pot too long is that the plant may have used all the soil in the the pot and be nothing but a mass of roots.  They can still be kept alive in the pot with daily watering and regular fertilizing, but once planted it creates an air pocket that eventually causes the plant to dry and freeze out over winter.  If the pot is big but fells surprisingly light, or blows over in the nursery with just the slightest breeze this is probably the case.  This makes them easy to spot from a distance.  These roots are a little tight, but healthy!

Finally, the plant needs to have enough root mass to support the plant. A plant should have ten inches diameter of pot for every 12” of height on top. On trees, they should have 20” diameter of root for the first caliper inch of truck, and 10” for every inch of trunk after. If an evergreen is grown in a pot, the width of the foliage and branches should not be more than 50% wider than the width of the pot. It is acceptable for a plant to have been pruned back to stay in a pot and can be benefitial to the long term habit of the plant, as long as the roots have not out grown the pot.

3.) Balling and burlapping plants is typically reserved for very large shrubs, over 24” in evergreens and 36” in deciduous plants, or for trees. Very rarely are plants bug by hand in the field due to labor costs.  As mechanical digging has grown in popularity, so have the problems associated with it.  As a result it is recommended that if all possible you hire the person selling the plant to install it with a warranty on both the plant and the labor.  I would never buy balled and burlapped material from a mass retailer that doesn’t specialize in plants.

Healthy balled and burlapped plants will have been dug when the soil is moist but not soggy. They are typically grown in soil with a little clay to help hold the ball together, and will be wrapped in natural fiber and bound with biodegradable twine. Balled and Burlapped plants should always be shipped within 24 hours of being dug and immediately covered in mulch or gravel, and watered upon receiving. The roots or outer edge of soil should never be allowed to dry out. Once they have, it can take over a year for active root growth to resume. Any time roots can be seen emerging from the burlap into the surrounding mulch you can be assured the root system is healthy and has been well cared for.

These balls are actually a little small.

There are a few things to always look out for when selecting a balled and burlapped plant. Never buy a plant that has a mushy or crumbly ball.  Most likely the roots have been broken apart. Balls that are dry and hard with no sign of new root growth emerging from the fabric are probably not viable no matter how good the top looks. When the ball is lifted from the ground, if the bottom falls out or the burlap sags like a wet diaper, the plant has been sitting in water for a prolonged period of time and the bottom has rotted out.  At the top of the ball there should be a string encircling the trunk of the tree or base of the shrub. If this sting has cut into the bark, or the bark has grown around it, the plant has probably been girdled and will most likely suffer or die. Finally, many nurseries will rewrap the ball with fresh burlap if a plant has set on the lot too long. If the plant looks like it has been on the lot awhile, but the ball does not, don’t be afraid to look under the burlap to see what is underneath.

Sizing the root mass compared to the top.

There are a few standards that should be met regarding the size of the ball. The size of the ball needs to be proportionate to the top of the plant depending on what type of plant it is. Also when selecting a tree, it is best if the ball is large enough to support the top without need for staking.  Some good standard ratios for ball size are detailed below.  These numbers are based upon ANLA standards, and adjusted for the reality of current digging equipment and techniques.  The are also chosen to make sure you get the best stock, not the minimum standard.

Coniferous and Evergreen Trees 18″ of ball for the 1st 3′ of height and 10” of ball for each additional 1′ of height.

Coniferous or Evergreen Shrubs 10” of ball for the 1st 1′ of width, and 6” of ball for each additional 1′ of width.

Deciduous Trees 18” of ball for the 1st caliper inch of trunk and 10” of ball for each additional caliper inch of trunk.

Deciduous Shrubs 12” of ball for the 1st 1′ of height and 12” of ball for each additional 1′ of height.

Broadleaf Evergreen Trees 18” of ball for the 1st caliper inch of trunk and 10” of ball for each additional caliper inch of trunk.

Broadleaf Evergreen Shrubs 12” of ball for the 1st caliper inch of trunk and 6″ of ball for each additional foot of height.

Balled and burlapped plants are always best handled by experienced gardeners or professionals.

There are many more things to take into consideration when selecting plants such as the branching structure, disease, the shape, and variety, but the most important thing to the health of the plant is the roots.  We will bring you more on pruning and shape later, but when buying at tree or shrub they almost all have pruning issues.  Mainly becasue the are being pruned to grow roots, fit in a retail space, and sell…not Grow!  That topic needs its own post. 

As for disease and insects, those are common as well in nurseries.  However, on deciduous trees, as long as the damage is limited to leaves it won’t matter.  They will fall off in the fall, and you really don’t want much growth in the first year.  So if the plant has a nice shape and is green some spots on the leaves won’t hurt.  As for evergreens, if it has an orangish or brown cast avoid it.  There are probably mites in there!  Evergreens with a determinate growth rate cannot grow from old wood if it the loose branches, so be sure the plant is healthy.  However, if nurseries killed everything that got on their plants they would probably killing you too. So if you see a tree that doesn’t have scarred up bark, and broken branches everywhere, but has a few spots on the leaves, as long as it has the root system and has been handled as described above you should be successful.     

The bottom line is if you want to be successful you have to dig a little deeper and get to the root of things.  As long as you water a plant well and keep it wet until you get it in the ground you should be succesful if you start with a healthy plant.  Have you ever wondered why retailers guarantee plants?  It is because they know if you get it home, it has a better chance of  surviving than if it stays with them. 

Next Weeks Blogs…Planting and Watering: Learn how to keep things alive and make them thrive!