Let's discuss the elephant in the garden: INVASIVE SPECIES.
In my last post, I discussed doing an evaluation of your property to get an idea of the scope of the job.
In my evaluation, I discovered I had a problem with invasive species. There are probably more, but seeing the ivy, periwinkle, grape vine and... something else (shudders) is enough for now.
Let's have a frank discussion, shall we?
I work at a garden centre. Every spring and summer, customers ask me for ivy, for periwinkle (AKA myrtle, vinca and some other names). These customers have a problem area they'd like to hide, a fence they want covered, a shady slope that needs some green. And to each one I say the same thing: are you aware that these are invasive?
In the garden, I define an invasive species as one that is not native and which has a negative impact on the environment. Invasive plants threaten biodiversity and habitat in a garden, and, later, once they've inevitably escaped, in the greater community.
In fairness, most of my customers are not aware that the plants they are asking for are invasive. I have some first-hand experience with these little devils, so let me share.
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| They seem innocuous enough. |
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| But then they start to climb. |
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| And eventually choke the tree. |
I have tried to save as many trees on our property as I can. I have cut ivy tendrils that are fifteen centimeters in diameter! I hope cutting the stalk will kill the plant, but there's so many rootlets gripping the trees that it may be too late.
This poor tree, leaning drunkenly over our house, had to come down. The vines had strangled it.
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| Encased in ivy. |
It goes without saying, I hope, that a job like this needs to be done by a professional. It's not cheap, but it's cheaper (and less stressful) than having the tree crash onto the house. There are lots of good tree people out there. Ask your neighbours if they know someone, or seek out someone local. Ask how they plan to do the job. If it's close to a building, you want someone who will be climbing the tree and taking it down one chunk at a time. If there is an invasive species in the tree, like in ours, don't keep the mulch. It will just introduce more of those little devils onto your yard.
That's just a single illustration of what one invasive species can do, but the question is: HOW to get rid of them? I have a feeling this will be a long term undertaking.
I have been removing everything above ground as best I can. The ivy is being torn out by hand and we're cutting out everything that is climbing the trees and winding through the fences. I don't want to spray, and even if I did, I would still need to remove the dead material.
Once the surface is cleared, I am going to put down the heaviest landscape fabric I can buy, and then cover that in a thick layer of mulch. I wondered about using old carpeting, but was worried about chemicals that might leach into the soil. And plastic would destroy all the good hummus I want to encourage in my garden.
I've been doing some reading. In about two years, I should have success. In the meantime, every scrap of vine that dares make an appearance will be yanked out and glared at sternly. In the meantime, I will be learning more about container gardening.
So back to the customer who wants ivy for their garden. I suggest alternatives, like climbing hydrangea, honeysuckle, hyacinth bean, or clematis. Replace periwinkle with bugleweed, for example.
For more information on invasive species in Ontario, check out
http://www.invadingspecies.com/ . If you're not in Ontario, a quick online search will point you to a site for your area.
Up next: Don't Panic: Step Three. Prioritise.