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Is One of These Invasive Vines in Your Garden?
Whether a plant is invasive or not depends on their natural growth habits and where they are located. Many of the species included in this list are actually beautiful plants. For example, the porcelainberry has intriguing turquoise and purple fruit. The wisterias look gorgeous growing over arbors.
Since they often grow rapidly and send out new shoots in all directions, vines can easily become invasive. One way to check and see if they will be problematic in your garden is to call your local extension service or nursery for information. While there are both herbaceous and woody vines, this will focus on the lianas, which are the species that become woody.Continue to 2 of 12 below.
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Algerian ivy can spread quickly throughout your garden if it is given the chance. It is very easy to start from cuttings and roots will be formed along the stem where it touches the soil. The roots, like English ivy (Hedera helix) can attach themselves to buildings and tree trunks also.
This plant can be used as a houseplant where it will be easily kept in check. As long as you are monitoring growth, it can serve well as a groundcover in your shady spots. Algerian ivy could also be a good choice for landscapes near the beach since it can tolerate salt well.Continue to 3 of 12 below.
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Even though the wisterias are rather gorgeous when in full bloom, they tend to become invasive. It has the ability to form new roots at each node and will do so wherever it touches the ground, allowing it to spread further. Try the native American wisteria (Wisteria frutescens) instead for better control.
Another way to potentially manage this liana is through careful pruning. With proper care and attention, this can be turned into a plant that is more like a shrub.
One way to distinguish Chinese wisteria from Japanese wisteria is by observing how the vines wrap around objects. Chinese wisteria will twine in a counter-clockwise fashion, while Japanese wisteria goes clockwise.
The Chinese wisteria spreads its seeds by flinging open their pods and shooting out the seeds. The sound can be quite loud.Continue to 4 of 12 below.
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Like Algerian ivy, English ivy can be used as a groundcover, especially in shady locations. Put it too close to a building, though, and it will soon scramble to cover it by attaching its stems to the wall with rootlets. It can also wind its way up a tree trunk easily.
We almost always see English ivy in its vining (juvenile) form, but under the right conditions it can mature and take on a shrub form.
The fruit can be poisonous for people.Continue to 5 of 12 below.
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Five Leaf Akebia
Though the five-leaf akebia has pretty flowers and fruit, it will overtake your garden if you are not careful, especially since you should plant more than one if you are trying to ensure pollination.
The chocolate-purple flowers are sweetly scented and intriguing. The five leaf akebia does produce an edible fruit. These plants are monoecious. It can be difficult for fruiting to occur naturally, so you can help it along by hand pollination. A paintbrush can be used to spread the pollen on the stigma.Continue to 6 of 12 below.
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Many of the honeysuckles can become invasive and the Japanese honeysuckle is no exception. The flowers are beautiful and smell like vanilla, bringing bees and hummingbirds to your garden. Birds will also come visit to eat the fruit.
However, you need to REALLY like these features as this vine spreads throughout your whole yard and is difficult to remove completely. It can spread itself through rhizomes under the ground, runners above ground, and seeds.Continue to 7 of 12 below.
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The Japanese wisteria does not flower as well as Chinese wisteria does, but is similarly invasive. A distinguishing characteristic is that the blooms gradually open from the base onward. On Chinese wisteria, they will all open at the same time. One way to control spreading is deadheading so no seeds are created.Continue to 8 of 12 below.
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Kudzu is a poster child for why you should be careful in importing plants. This semi-woody vine was brought to the United States and introduced to farmers as a potential forage crop and erosion controller. They were encouraged to plant it until people realized that it took over everywhere and smothered the plants they actually wanted. It is now widespread throughout the southeastern US.
There are enough kudzu vines in the United States, so avoid planting this for any reason. If you have some, you can follow the sage "advice" as found on Floridata: "Mulch with cinder blocks, fertilize with Agent Orange, and prune daily." You would not really want to use Agent Orange, of course, but you will definitely need to bring out the heavy artillery for this species.Continue to 9 of 12 below.
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This vine wraps itself around trees and can cause their eventual demise. As with many invasive plants, it was originally introduced to the United States because of its potential benefits. For Oriental bittersweet, it was the fact that it helps keep soil erosion to a minimum. Unfortunately, it took readily to some U.S. climates and spread like wildfire.
This vine is dioecious. It can sometimes become a shrub. Some plant it so they can use the colorful berries in dried arrangements.
You will need to be very patient if you want to get rid of Oriental bittersweet. Once you have made sure that it is this species and not the native bittersweet (Celastrus scandens), cut and remove all of the vines that you can. Glyphosate will produce better results, but even that is not foolproof. Several sessions of removal will likely be needed.Continue to 10 of 12 below.
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In addition to being quite invasive, poison ivy is toxic for many people, as are many members of the cashew family. They contain a substance known as urushiol. These vines may grow into a shrub shape.
The rhyme learned as a child to help avoid it was "Leaflets three, let them be. If it's hairy, it's a berry".
Plants of the Toxicodendron genus used to be included with the sumac species and are sometimes still found under the name Rhus.Continue to 11 of 12 below.
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Porcelain berries come in unusual shades of purple and turquoise, making them an attractive plant for fall color especially. You will need to give them some sort of support. They do spread easily so check with your extension office to see if it is invasive in your area.Continue to 12 of 12 below.
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You'll usually see this used as a groundcover in the landscape. This has both juvenile (vine) and mature (shrub) forms similar to ivy, as well as the habit of using rootlets to climb up trunks and walls. These two plants are in different families, though.
It has become problematic in eastern North America and you should call your local garden center or extension service before planting to assess how it will do in your area.