The tag at the garden center may say that a plant is “long blooming, low maintenance and fast growing.” If this description seems too good to be true, it’s because it sometimes is. Many plants once recommended for the garden have since left our carefully curated landscapes and invaded nearby natural areas. Once invasive plant species gain a foothold in natural spaces, they crowd out the native plants that birds, pollinators and other wildlife depend upon.
Invasives are defined as nonnative, adaptable plants that reproduce by seeds, stems and roots, which are either spread by wind, deposited by birds or carried into new areas by people, pets and visiting wildlife. Here’s a list of the worst irritating, poisonous and invasive plants. Now that you know which invasive plant species to avoid, learn how to get rid of them for good.
Never plant these invasive shrubs (and what to grow instead!)
How to Get Rid of Invasive Plant Species
Remove and discard small invasive plants, including the roots, as recommended by your local municipality. Many allow you to place these in the trash since they will be buried in a landfill. Avoid composting invasive plants unless your pile is hot enough (150 to 180 degrees) to kill the plants, roots and seeds. See how to make compost.
For larger tree and shrub specimens, you will need to use different techniques. You can slowly kill problem trees by either removing a 6-inch strip of bark around the base of the plant or painting the bottom 12 inches of the trunk with a recommended herbicide. Also, you can choose to cut the plant to the ground, then treat the stump with either a brush killer or total vegetation killer to prevent the stump and roots from sprouting. As always, read and follow label directions carefully.
Discover the best natural way to kill weeds.
Remove Invasive Plant Tick Havens
Removing invasive plants also can help reduce disease-carrying tick populations. Studies have found that the presence of Japanese barberry and honeysuckle bushes create the perfect habitat for both deer and the ticks that feed on them.
Follow these tips for deer resistant plants and deer deterrents.
Watch for Invasive Plants in Décor
Door swags and wreaths can also contribute to this problem. These decorations can contain invasive plant species, such as teasel and oriental bittersweet. Their seeds may be released from the arrangements into nearby gardens, eventually making their way to natural spaces.
Is an Amur maple shrub invasive?
Find Alternatives for Invasive Plant Species
To avoid accidentally adding troublesome plants to your yard, do a bit of research before purchasing. Check with your local nature center, the Department of Natural Resources or a nearby university extension service for lists of known invasive plant species in your region. In addition, the U.S. Forest Service and Invasive Plant Atlas of the United States are two extra-helpful online resources worth looking into.
Have fun replacing troublemaking plants with better alternatives. Select native plants suited to your yard’s growing conditions and available space. Of course, look for options that support birds, such as native trees and ornamental grasses, and help pollinators, such as butterfly host plants.
Next, learn how to get rid of the worst garden insects.