Quick Answer: How Do I Stop Periwinkle From Spreading?

Is Periwinkle considered invasive?

Because periwinkle is conspicuous in the winter and is known to be invasive in Maryland and other states, the Maryland Invasive Species Council has selected Vinca as the January Invader of the Month.

Common and bigleaf periwinkle are members of the dogbane family (Apocynaceae) and are native to Europe and western Asia..

Will periwinkle take over grass?

Once established, the vines’ broad leaves shade blades of lawn grasses, especially those kept under 2 inches tall, as they form colonies across lawns. By shading and competing successfully for moisture, periwinkle strangles less drought- and shade-tolerant grasses.

What is the difference between Vinca minor and major?

The main difference between Vinca major and Vinca minor is that the leaves of V. major are slightly broader, larger, ovate, or heart shaped, while those of V. minor are small, elongated, lance-shaped. This can help identify the species.

Do periwinkles spread?

They are borne in abundance in early spring and sporadically throughout the summer. Large periwinkle spreads rapidly and will mound up to 2 feet. Non-flowering stems root at the tips where they touch the ground.

Why is periwinkle called flower of death?

Periwinkle, an evergreen trailing groundcover, is a common invader throughout most of the United States. It is native to Europe, where it was commonly known in folklore as the “flower of death” because its vines were woven into headbands worn by dead children or criminals on their way to execution.

Is Periwinkle poisonous to dogs?

The vinca alkaloids known as vinblastine and vincristine are widely used in chemotherapy to treat a variety of cancers in humans and animals. Since this periwinkle contains these alkaloids, if ingested by dogs, they can be poisonous and cause a variety of side effects.

Will periwinkle choke out weeds?

Once established, growing periwinkle will likely shade out future growth of weeds and eliminate this chore. … Periwinkle is best used for controlling erosion as described above. Do not plant near other specimens in the flower bed or garden, as it may overtake and choke out valuable plantings.

How do you get rid of invasive vinca?

Pull the vinca and its roots when the ground is slightly moist. … Cut the vinca with a lawn mower or trimmer and immediately apply a 5 percent solution of glyphosate to the cut foliage and stems.More items…

Do periwinkles come back every year?

Periwinkles are annuals and must be replanted every year. They do produce lots of tiny seeds as they mature, so they reseed themselves or you can collect the seeds for next year. Also, because they are so prolific in their reseeding, you may have more periwinkles than you desire.

Does periwinkle bloom all summer?

The blooming period for vinca flower, also called periwinkles or Catharanthus roseus officially, depends on what types of vinca are involved. … major) bloom primarily in spring. Annual vincas bloom through the summer. All vincas are usually ground covers or container plants.

When can you cut periwinkle back?

Prune periwinkles back to about four inches tall with clean, sharp shears in early spring to reduce the plant’s natural tendency toward ranginess. Do this immediately following the last predicted frost for your area and before new growth begins.

Will periwinkle kill other plants?

It’s an aggressive ground cover that grows like crazy, yet it’s gentle enough to not kill other flowers in the garden. … The trick here is only get flowers that are more then 6 inches tall, don’t plant seeds and expect them to grow with periwinkle in the way either. It won’t climb or chock flowers or bushes.

Does periwinkle die in winter?

Vinca (Vinca minor) also called myrtle and common periwinkle, grows in U.S. Department of Agriculture plant hardiness zones 4 to 8. In these climates, it generally survives the winter. It’s grown as an annual in colder regions, although vinca might survive under snow.

Does vinegar kill Periwinkle?

Pour into a garden sprayer and apply generously to the cut Vinca plants. The vinegar may not kill the weeds, but it will weaken them. Don’t expose desirable plants to the solution, which kills indiscriminately.

How deep are vinca roots?

Periwinkles are “fairly deep-rooted” (review by [79]). Common periwinkle plants in western Montana exhibited fibrous roots ranging from 1 to 3 inches (3-8 cm) long [96].