The Invasive Plant Atlas of the United States lists Ajuga reptans (Carpet Bugle).
Invasive species have led to the extinction of 42 percent of U.S. endangered and threatened species, and 18 percent of U.S. endangered or threatened species, according to the US Forest Service. Invasive plants compete directly for moisture, sunlight, nutrients, and space with native species. They dispense with and change natural plant populations, harm wildlife habitat and water quality, and may contribute to soil erosion.
According to the federal government, roughly a quarter of the 20,000 plant species native to North America are endangered, with many of them owing to habitat degradation. Planting beautiful native plants in your garden will assist to counteract this tendency.
A plant is said to be native if it has evolved organically in a certain region or environment without the intervention of humans. Growing native plants has numerous advantages. For starters, these plants have better soil, moisture, and weather adaptations than exotic plants from other regions of the world. They require fewer fertilizers, herbicides, and water. Second, they are unlikely to become invasive and ruin natural habitat if they escape. Third, unlike invasive plants, they benefit wildlife by providing refuge and food for native birds and insects.
Is Ajuga an invasive plant?
Don’t be fooled by a plant’s size. Ajugas may be little, but they are strong and hardy groundcovers. They can help with erosion control on a bank or slope, fill in a patchy lawn where grass won’t grow, or simply offer color to shaded areas. They’re also excellent for planting beneath bushes and trees.
Ajugas are very attractive because their leaf color and attractiveness last virtually all year, and they produce blue, purple, or white blooms from spring to summer. Ajuga reptans, sometimes known as carpetweed or bugleweed, is a perennial that thrives in zones 3 to 9.
The lustrous leaves of these evergreen shrubs form dense mats. They can tolerate full sun to partial shade, but full sun brings out the greatest color in the leaf. Ajugas are easy to cultivate in practically any type of soil and prefer a moist, well-draining environment, but they can endure dryness for short periods of time.
Because ajuga spreads through stolons, or horizontal stems that creep along the ground, it’s important to consider where you plant it. This mint family member spreads quickly and can become invasive. Planting too close to flower beds, lawns, or other areas where you’ll have to remove it frequently is a bad idea. If you’re worried that ajuga is an invasive plant in your area, check out the Invasive Plant Atlas.
Plant ajugas when all dangers of frost have passed. Then, spacing the holes 8 to 15 inches apart, dig holes just deep enough for the root balls. Gently loosen the roots of the plants, then plant them and firm the dirt around them. To settle them in and eliminate air pockets, water them thoroughly. Fertilizing ajugas is rarely necessary.
To keep your ajugas from becoming overloaded, you should thin them every three years or so. If desired, divide and replant established clumps in the fall or early spring.
Crown rot is an issue, particularly in hot, humid climates or in heavy soils. It’s easy to notice since the lower leaves have rot and spots on the tops of the plants. Give your plants plenty of air circulation and avoid overfertilizing to avoid this illness. Crown rot has no treatment, therefore if it appears, you’ll have to uproot and destroy the damaged plants. When it’s time to replant, consider a new type of groundcover to reduce the chances of the problem reappearing.
Patches of ajuga will occasionally die. If this occurs, remove the dead leaves but leave the roots in place. In most cases, the plants will return the next year.
Ajugas are low-maintenance plants with good rabbit and deer resistance. They don’t need to be pruned, but if you want them to look a little neater after the blooms fade, mow them using a high setting on your mower.
Try coral bells, hostas, ferns, daffodils, astilbe, forget-me-not, violas, hardy geraniums, and other woodland species if your ajugas are in the shadow.
How do you stop Ajuga from spreading?
Don’t put the plants in your compost pile; they’ll take root and you’ll be right back where you started – or worse.
Making a DIY, ecologically friendly pesticide by mixing equal parts very hot water and vinegar is another technique for getting rid of bugleweed. Add a pinch of salt and a few drops of liquid dish soap to the mix. Use a spray bottle or a garden sprayer to apply the solution.
If your grass doesn’t have ajuga, you might be able to smother huge portions with black plastic. Leave the plastic secured with bricks or boulders for two weeks to allow the sun to “bake” the ajuga. Leave the plastic in place for another two weeks if the plants are still alive.
Chemical herbicides – If all else fails, a chemical herbicide may be required for ajuga weed control. If you have ajuga in your lawn, read the label carefully and apply a non-selective herbicide that will kill the ajuga while leaving your lawn unharmed.
Chemical management should be utilized only as a last resort because organic methods are more environmentally friendly.
How fast does Ajuga reptans spread?
Ajuga reptans, sometimes known as carpet bugleweed, is a prominent ground cover. It spreads rapidly by runners, forming a mat of dark green leaves 2 to 3 inches across in full sun and 3 to 4 inches wide in part shade. In full sun, selections with bronze or metallic-tinted leaves hold their color the best. The flowers, which are usually blue, are borne on spikes that are 4 to 5 inches tall. Early May to mid-June is when the plant blooms. Set aside established plants in the spring and they will cover the soil in one growing season. Plants should not be planted too deeply. It’s never a good idea to hide the crown. Runner plants can be dug out and replaced in the spring or early fall from established plantings.
Ajuga genevensis (Geneva carpet Bugleweed) is a perennial rock garden plant that grows 5 to 14 inches tall. It has grayish, hairy stems and coarse-toothed leaves up to 3 inches long that do not spread via runners. Blue flower spikes are the most common, but rose and white varieties are also available. Because it spreads more slowly than A. reptans, this upright species is gaining popularity. It is more sun tolerant than other Ajuga species.
Ajuga pyramidalis (Upright Bugleweed) is a 2 to 10 inch tall erect plant. Runners are not involved in the propagation of this disease. Many roundish, 11/2 to 4-inch long leaves grow from the stems, which contain long grey hairs. The huge purple bracts appear to press against the blue blooms on the flower spikes, which are 4 to 6 inches long.
Will Ajuga choke out other plants?
There’s no doubting that Bishop’s Weed in variegated form is a lovely plant. It thrives in shady areas where splotches of white are needed to liven things up. But you’ll never be able to enjoy just a smidgeon of Bishop’s Weed. Its roots form a dense mat as it grows, suffocating any neighboring vegetation. While this may sound like a good way to keep weeds at bay, it will eventually take over your garden plants as well.
Bishop’s Weed was initially labeled as invasive in Rhode Island in 1863, although you can still get it for sale. You may probably determine it’s a member of the carrot family by looking at the white, umbel blossoms, which look a lot like Queen Anne’s Lace. The plant does attract helpful insects, so it has some virtues, but it is simply the incorrect plant for many situations.
If you’ve already planted Bishop’s Weed and regret it, the best way to get rid of it is to use up all of your resources. In the early spring, cut it as short as possible and cover the area with plastic. The plants are unable to photosynthesize, receive insufficient water, and are overheated. They ultimately give up, even if it takes a long time.
Goutweed (a mashup of goat weedgoats will eat it) and Snow on the Mountain are other names for Bishop’s Weed.
How do you control an Ajuga ground cover?
Using impermeable black plastic sheeting, cover huge portions of ajuga to be removed (weed mulch or heavy garbage bags). Leave the area alone for at least four weeks after anchoring it with rocks. This deprives the plant of both light and water, severely limiting its ability to thrive.
Is ajuga invasive UK?
I’d like to issue a caution regarding bugleweed (Ajuga), which gets its name from the shape of the blue blooms that line its flower stalks: don’t be fooled by the pleasant music it makes in the landscape! It’s a very pleasing groundcover (especially those with purple colour), as my photo shows; unfortunately, it’s also an invasive plant like creeping jenny.
The kinds with dark leaves (such as Ajuga ‘Chocolate Chip’) are attractive even when they are not in bloom. Such leaf plants are a smart choice for savvy gardeners, as they provide a longer-lasting visual appeal than plants whose major selling point is their beautiful blooms.
Some cultivars contain the word “purple” in their names, indicating that they have purple leaves:
If you must grow Ajuga, do it in locations where you want it to take over, not in flower beds, because it is an invasive plant. When grown in the latter, off-shoots from the original planting must be cut on a regular basis! Ajuga, for example, would be a good substitute for lawns since it produces a mat and is strong enough to withstand foot traffic.
Should I get rid of bugleweed?
A few sprigs of bugleweed on your lawn may give a splash of color, but the invasive perennial weed may quickly take over as your yard’s dominant ground cover. Bugleweed, also known as ajuga, is a tenacious weed that thrives in temperate areas, and eradicating it is critical for the health of the rest of your garden or lawn plants. Before you go for a chemical herbicide, consider less harmful alternatives for eradicating the invasive weed.
Is ajuga Black Scallop invasive?
Invasive tendencies in Ajuga reptans ‘Black Scallop’ Care From full sun to partial shade, any soil will suffice. To avoid crown rot, thin the runners.
Seeds
Planting seeds is one technique to begin propagating ajuga plants. Sow ajuga plant seeds in containers in the fall or spring if you chose to do so. Simply apply a small layer of compost to the seeds and keep the soil moist.
In a month or less, the seeds germinate. Individual plants should be pricked out and placed in larger containers. Move the young plants to your garden beds in the summer.
Division
Stolons, which are underground runners, spread Ajuga. The plant is rooted in neighboring soil by these runners, which create clumps. The ajuga clumps will soon get overcrowded, and their strength will wane. Now is the moment to lift and divide them so that you can have more ajuga plants.
Ajuga division propagation is best done in the early spring or late fall. It’s a straightforward procedure. Simply dig up the clumps, pull or chop them apart into smaller portions, and transplant them in a different spot.
You may also just chop away large portions of plant mats similar to lawn sod and relocate them.