Say the words “invasive plant” and you’ll get a wide range of reactions, from horror to defensiveness to irritation to confusion. But rarely will you get no reaction at all. That’s because, as with any widespread issue that gets press, the severity and complexity of the problem arouses emotions. As cultivators of plants, we find ourselves involved in the practical side of this global issue, but with local concerns. Everyone has seen the kudzu monsters, tree-of-heaven corridors, or common reed coastal takeovers, but you’d be very hard-pressed to find any of these plants for sale to the public. Yet equally invasive plants such as Chinese privet (Ligustrum sinense), porcelain berry vine (Ampelopsis brevipedunculata), or Callery pear (Pyrus calleryana) are still found in the aisles of big box stores and nurseries. And this is where gardening comes face-to-face with the issue.
A plant is generally considered invasive if it is not native to the local ecosystem and if its introduction and subsequent spread causes environmental and/or economic harm. The way I put it to my young son is that these are “bully plants”—they take over, suck up resources, and don’t allow other plants, and the insects and other creatures that depend on those plants, to grow there.
Here we can see Chinese privet that has completely taken over this woodland area, preventing native species from growing (left), and yet I still found it available for purchase at the nursery section of a local big box store (right). Photos: Paula Gross |
I could spend many words on the science of invasive species, but I want to head straight to the practical side of what it means for us gardeners. When it comes to purchasing and planting known invasive species, my personal bottom line is “Just don’t do it.” What you gain (or believe you are gaining) is simply not worth it—not only for your own garden and future maintenance, but for the unmanaged surrounding landscapes that don’t have a loving gardener to keep things in check. We are all connected in our local ecosystems, and our health and longevity depend on seeing the bigger picture.
Below I’ve included a chart of invasive species and native Southeastern alternatives. In this chart I’m covering the entire Southeast from mountains to sea, which encompasses a lot of diverse ecosystems! What is invasive in one area may not be so in another. However, with climate changes, those traditional boundaries are changing. So take my list as a jumping-off point. If you see something you recognize, dig a little deeper to learn of the particulars of that plant in your corner of the Southeast. There are many more native alternatives than the ones I’ve listed, as well as nonnative options. Realize that plenty of nonnative plants show no tendency to be invasive and are fine garden plants. So if you’ve got a new plant in mind, just do a quick Google search to verify how it’s been behaving in your ecological neighborhood, or check it here.
Invasive woody species for sale |
Native alternatives |
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Invasive vines for sale |
Native alternatives |
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Invasive ground covers for sale |
Native alternatives |
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Invasive herbaceous species for sale |
Native alternatives |
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Paula Gross is the former assistant director of the University of North Carolina at Charlotte Botanical Gardens.
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