By Mark Czarnota
University of Georgia
Native and ornamental vines can become weedy problems in your
ornamental trees, shrubs and flower beds. Many can be hard to
control if left unchecked.
Among these troublesome vines are cross vine (Bignonia
capreolata), bittersweet (Celastrus species), English
ivy (Hedera helix), Virginia creeper (Parthenocissus
quinquefolia), wisteria (Wisteria species), kudzu
(Pueraria montana), greenbrier (Smilax species) and
poison ivy (Toxicodendron radicans).
Some of these, like English ivy, have ornamental value. Others,
like Virginia creeper, are important sources of food for
wildlife. In a perfect world, all of them would be maintained or
removed when they’re small plants.
Unfortunately, many people buy property that has vines rambling
through flower beds and climbing up anything they can take hold
of. Sometimes the previous property owner planted them as
ornamentals and, unsupervised, the vines take over.
A few tactics
Whatever the reason, if you have a vine you’re trying to get rid
of, a few tactics could help in your efforts.
First, consider trying to maintain the vine you’re about to
remove. English ivy, Virginia creeper and cross vine can be
brought in bounds with a little pruning.
Many of these plants can take years to reach the stature they’ve
achieved. These plants don’t become a problem overnight. Even the
mighty kudzu can take years to cover a tree canopy.
You might want to consider, too: What will replace the green mass
when it’s gone? Is the vine that big a problem? Can it be brought
down to a manageable size if pruned?
If you’re adamant about removing the plant, there are two ways to
do it: physically, or with herbicides.
Effort will vary
The effort of pulling up the vine will vary with the plant. A
well-established wisteria can be hard to remove, requiring the
use of heavy equipment. On the other side of the spectrum, a
young cross vine can be easily removed just pulling it out.
If you’re not opposed to using herbicides, a combination of the
two control measures can be the best plan of attack.
Many vines, like wisteria, kudzu and English ivy, can be
partially controlled by simply cutting the vines a few inches
above the ground and painting the freshly cut stem with a
herbicide containing glyphosate (as in Roundup — 41-percent or
more) or triclopyr (as in Brush-B-Gone). Use both in full- or
half-strength solutions.
‘Paint’ the cut stem
To the cut stem coming from the ground, apply herbicide with a
paint brush right after you cut it. The degree of control will
depend on the time of year (fall is better) and the plant species.
If the vine starts to regrow, wait until the shoots are 6 to 12
inches long. Then treat them with a 5-percent solution of
glyphosate (about 7 ounces to a gallon of water with a 41-percent
active-glyphosate product). Either spray it on or wipe it on with
a sponge. The triclopyr product will work, too.
With any postemergent herbicide, take care to prevent spraying
desirable plants’ foliage and stems. And when you use any
pesticide, always take time to read and follow the label
instructions.
(Mark Czarnota is an extension horticulturist with the
University of Georgia College of Agricultural and Environmental
Sciences.)
