The Devolution of Thought and Evolution of Species
As yesterday would have been the 201st birthday of Charles Darwin I found it overly ironic that all I saw on the news was a barrage of people declaring that global warming was a farce because it had snowed outside. I have to admit that I am starting to find the snows I have missed from my youth a bit annoying now. However it hasn’t effected me enough to start denying reality and the evidence of real science. I may be delirious from cabin fever and the total loss of routine from an ad-hoc school schedule, but it is not about to lead to the closing of this American mind.
Had it not been for the steady drumbeat of an old friend’s facebook status, Chuck-D Day might have slipped by me completely. This friend is someone I new well in my youth. For many years as children we spent every daylight hour walking up an down our town’s railroad tracks and creeks collecting turtles, snakes, frogs, salamanders and any other little critter we could get to ride home in our pockets. Of course we evolved over time, and got smart enough to carry buckets and boxes. At one point we even moved up to traps and converted a neighbor’s walk in aviary into an all out zoo. This particular friend is now a Herpetologist and was leading a read-a-thon in which they finished the Origin of Species in approximately 18 hours. (I can only assume this was faster than the last time.) As I watched the devolution of our politicians minds on TV his constant updates assured me that somewhere someone was actually evolving.
As for my own celebration, it was going on in my head all day. As I spent all day listening to the talking heads knowing full well they were incapable of thinking, I was thinking about how I became most aware of global warming through the spread of invasive species. Over the years I wasn’t always aware of either problem, it took a move to a different climate to make me see how differently things react under the slightest change. It became even more evident when I began working across the 3 distinct zones from North Georgia to Virgina that I could see how differently species adapt and react to different ecosystems. Hybrid Burning Bush and Barberry that for years no one would have imagined spreading are not only growing from seed, but they are adapting and moving into climates that normally would have been to cold for their seed to survive.
When I hear people talk of climate chance, I always hear about it’s effect on water, and people. How the oceans will flood the cities, rivers will run dry, and other factors that we see directly related to our needs as humans is all that seems to matter. The only time I hear plants discussed is in how trees can offset carbon so we can create more. Unfortunately I hear more talk about whether the change exists in the first place, than what we can to do prevent it. However, more than fighting of global warming plants can help us see and understand it.
In some respects plants are the antithesis of humans. Plants adapt and get stronger every year and can live several of our lifetimes, but they create a new generation and pass on those traits every year. When winters were consistent invasive species were easier to keep in check. The annual minimum temperatures used to keep the non-native seeds in check year after year. As winters have gradually warmed, those seeds have have adapted and become more cold tolerant as those few extra degrees have allowed them to survive. Now they can handle the extreme conditions that now occur once every five years instead of annually. We on the other hand have not adapted. Burning Bush that used to be contained to areas near it’s cousins in Georgia are now making their way up the coast to New York. Princess Trees, Barberry, Butterfly Bush, English Ivy, and many more are making that same journey. In less than a generation of our lifetime, these species have adapted to the climate change and produced dozens more generations while we are still arguing over whether it even exists.
As humans we are different from plants. We may live for decades but usually only reproduce during a short window of that time and in small numbers. While we do physically evolve generationally, we usually reproduce at a peak moment and then actually become weaker for the next two thirds of our life. Plants and trees that can live hundreds of years get stronger and reproduce every year until that last year of their life when they actually produce the most seed. Where we differ is in that we have minds that can evolve way beyond our physical bodies. However, unlike a tree whose wood gets harder with age and ease, we have to work and use our minds to keep them growing even as it gets harder. If we don’t do this, collectively as a society we can actually get weaker and devolve. The more we separate into individual pockets of though and deny the science that exists in nature around us the weaker we actually become as a species. Too often because of our self awareness we lose the awareness of the world around us and slow the evolution of our collective conscience.
In the United States we track plant hardiness and nativity with the USDA system for for classifying plant hardiness known as the USDA Zones. The system is based on a ranges of temperatures, recorded temperatures by areas, and the minimum temperatures those plants can supposedly take. The system isn’t based on where these plants should grow, but where they could grow. It also only covers minimum temperatures and not maximums. Even more odd, this “could” focus is based on how we can use plants to alter the environment through a commercial view not how to protect and preserve it. This is from the Department of AGRICULTURE though, not the Environmental Protection Agency. Throughout the world these systems vary, but an emerging and evolving trend throughout the world does not start with temperatures, it start with plants. Aerial photography is used to map where the species that form the canopy are, and the undergrowth can be determined by combining that and other data; yet another Copernican shift in the right direction. People are actually using plants to gain perspective rather than trying to fit them into their own perspectives and learning more about themselves and the world in the end.
Unlike trees, if our minds continue to grow after reproduction we cannot continue to pass it on year after year through our seed. Even what we do pass on isn’t the content of thought, only the ability. We can only continue our evolution as a species through education. The strongest ideas aren’t the ones that are said the most often, screamed the loudest or that have the most money to advertise them. They are the ones that come from listening, hearing, and collectively evolving with the world around us. Our evolution as a species is dependent the recognition of our role in the community of species, listening to each other within our species, and admitting that trying to be the strongest being isn’t necessarily in our nature as a species, and doesn’t make us the fittest species. As a species we can learn a lot from the trees around us, but the message we should learn isn’t to reproduce like the Duggars. It is that the world is changing, and for us to become the fittest species possible we have to continue to evolve mentally every year, even after our body ceases to evolve. The lesson is that our seeds are seeds of thought, and without them our minds cannot grow and neither can our species as a whole.
It is funny how we all develop. I probably could have guessed that my friend leading the read-a-thon would grow up to be a turtle hugger. As for me, while I was in horticulture at a young age, the technology I work in now was still in the form of a punch card and we couldn’t have seen this coming. There was a third member of or 9-10 year old research team, and I don’t think I wouldn’t have guessed the future for him either. He is writing his dissertation on the effects of invasive species on soil fertility in the upper Midwest. However, as kids nature planted seeds in our minds, and as we moved to different climates those seeds evolved with the world around us. I guess our evolution is proof that passion can evolve into thought and doesn’t have to lead to the death or denial of it. When I look at how we’ve grown, it is reassurance to me that for us to remain the “fittest” species we must continue to evolve our minds and realize that we are part of a community of species. Likewise, by denying evolution, including climate change, we deny our role in the community of species, weaken our collective mind and species as a whole, and jeopardize the species Earth as we know it. How this all came about isn’t what is important, but acknowledgement that it exists and our role in it is vital to our development as a species and to the survival of the world as we know it.














During the average growing season, most established plants can use no more than one inch of water per week. To be able to stick to this you need to make sure that all of the soil in and around the planting area has a deep base of adequate moisture. If it does, as the soil dries out immediately around a newly planted plant moisture will move from the surrounding soil to the soil in the hole through osmosis. If you plant a plant into to an area where all of the surrounding soil is dry, when you water all of the moisture will move the other way and you won’t be able to retain moisture around the plant. Whenever you are going to be planting an area, you should always water the entire area thoroughly. Think of it as getting the nursery ready for that newborn you are about to bring home. In the end it save you several trips to the store (or in this case hose).

Winter Watering isn’t something people usually think about. However a plant has more of a chance of dying in winter from a lack of water than it does in summer. The water that fills the tissue of a plant’s trunk and branches is actually what protects it from extreme freezing temperatures. When matter freezes it expands. When the cells of a plant expand, the gases inside can expand more than the tissue itself and cause the cells to explode. If the cells are filled with water it displaces those gases and keeps them from expanding too far. If a plant freezes when it is dry, it can literally freeze-dry the plant, making it impossible for the cells to retain water again. The best way to prevent this is to actually water in the fall or early winter before the ground freezes.
The main thing to remember when watering is the more frequent and less deep you water the more often you will have to water. The sooner you learn what your plants really the need, the less you will have to give them, and the less they will eventually need. To some extent, your plants can be taught to live with your schedule, and the sooner you teach them to the better off you both will be. Think of that deep watering you give your plants a couple times this winter as that Sunday afternoon pot roast or chicken and dumplings you make for your family on a cold winter day. It will keep their little cells warm on those cold winter days, and help built the muscles they need get through the summer ahead. It is also like the hearty soup that allows them to pull in all those nutrients from the soil below to fight off disease and stress. Think of watering you plants as caring for someone you love…and they’ll be sure and love you back. Plants are like people, so don’t treat them like a hardwood floor.
Castanaea dentata (American Chestnut): This tree is one of the most known stories of eco-catastrophe in our countries history. The Chestnut was the most coveted of all lumbers in the early part of the 1900’s. As a result was the clear-cutting of almost all of the Southern Appalachians. The practices were horrid, and reminiscent of a scene from a slaughter house, but of trees. Lumber that wasn’t seen as fit to mill was left in place leaving entire mountains looking like salvage yards. Stumps were left in place, and all of the ground vegetation was smothered under the debris. Erosion was rampant, and as a result these wastelands became a breeding ground for what would become the Chestnut blight. Species such as the black bear were almost completely lost, deer populations dissipated, and without the nuts to forage or forest to find protection from hunters Elk eventually disappeared.
Ulmus americana (American Elm): In the first half of the 1900’s this tree was the most common street tree in the United States. It’s arching branches formed cathedral ceilings over almost every street in every city. It become an icon of American urbanism and the America Beautiful movement. It fell victim not to greed of harvesting, or destruction of its environment, because this tree grew anywhere. Rather it fell victim to careless breeding and commercialization that weakened the species. While Chinese and European varieties were being imported for breeding to create fancy bark or brighter fall color, no one realized that they were weakening the species and importing a deadly disease that would bring the native species to its knees.
Pinus palustris (Longleaf Pine / Southern Yellow Pine): The Longleaf pine was on of the signature trees of Southeast coastal regions. This tree is very unique in that for the first eight years of its life it grows like a fireproof grass with no trunk elongation. Then it shoots up and it sensitive to burns, but once it reaches about 10′ it becomes fire proof again and soars to heights of up to 100′. This burning process is crucial to its reproduction and the culling of healthy forests. The lush wild look this process creates was the image that was burned into the minds of explorers when the new world was being discovered. The unique habit created by the juvenile plants provide habitat to all sorts of foul and wildlife and as their habitat has become endangered so have some of them. Red-cockaded woodpeckers and indigo snakes are most at risk, but tourtouses are in line right behind them.
Quercus virginiana (Southern Live Oak): Yes, this tree is the one we have embedded in our heads from movies like Gone With the Wind, and every other great southern movie or novel. As we see them in all the urban settings and plantation gardens you would not think something this majestic could be in any sort of danger. The Spanish soss and fern growing on its branches make it look as thought this species is drooping from the weight or its virility. However, in its native habitat it is almost gone. The boggy soil and forests of the deltas where it thrived have mostly been drained for drilling, sugar cane, and development. These trees made up the buffers that used to protect New Orleans from the onslaught of hurricanes. There ability to be uprooted and fall apart but continue to grow in the loamy soil that was once its home was the constant stability that held the delta together. Now their native habitat is down to a few remaining national and state controlled forests. Of course other species have been impacted, but the most famous impact was the damage from Katrina that was exasperated without the natural buffers these trees created to protect it.
Tsuga hetrophylla (Western Hemlock) & Tsuga caroliniana (Carolina Hemlock): Both of these trees have suffered similar fates. Both are the victims of over logging. Unfortunately both were thought to be invincible as they grew like the Red Cedars of the Midwest on either coast. In the East the Carolina Hemlock was hardly ever used for lumber, They were usually casualties of careless Chestnut and Oak harvest and turned into pulp or used for fuel. By the time the species was decimated people had realized it was a beautiful lumber and turned to the bountiful west coast for the Western Hemlock in its place. Neither were able to come back as fast as they were being harvested and as a result the faster growing Tsuga canadensis (Canadian Hemlock) and various Pines have taken their respective places.
Picea sitchensis(Sitka Spruce): Another victim of logging, this species is also succumbing to the woolly adelgid. One of the more tragic consequences of this parable is that this tree is the home to the endangered Spotted Owl. When the fight over protecting the owl versus the right to harvest came to a head the harvest rate increased dramatically as it turned into a race to see how much people could harvest as while they still could. As timber containing adelgid infested lumber moves up and down the highways it just spreads it even more. In the end both the owl and the loggers are losing out as they are losing the tree they both covet so much.
Thuja plicata Western Red Cedar: This tree has been devastated in its native habitat due to logging for pulp. However, it is thriving and making a surge in cultivation. As the Hemlocks and Junipers used in landscapes have become more problematic and disease prone, this tree grows with relative ease. It struggles to outpace the pines that are moving into the native habitat because the Pines grow larger and shade them out. While in the landscape people are finding this to be a great native alternative to give the feel of a Canadian Hemlock without the adelgids or chemicals to keep the bugs at bay. However do to massive logging its natural disbursement patterns have been disrupted permanently and it may never be able to reestablish itself against the more aggressive species taking it’s place.
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.
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.
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.
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.
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.
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.![spbua23[1] spbua23[1]](http://www.botanybuddy.com/blog/wp-content/uploads/2009/10/spbua231-300x201.jpg)
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.
