Invasive Shrubs

Common Buckthorn (Rhamnus Cathartica)

Buckthorn (both Common Buckthorn and Glossy Buckthorn) is an invasive, non-native plant that seriously threatens the local environment. These plants are very adaptable to many growing conditions and have no known biological controls; thus, when left unmanaged, they can overtake yards, woodlands, parks, etc. Buckthorn has the potential to out-compete native plants for light, moisture, and nutrients, diminish biodiversity, and, in turn, destroy wildlife habitat.

Control Options

There are several control options available for managing buckthorn, including pulling by hand (smaller plants up to roughly 3/8 of an inch), using a hand tool, such as a Weed Wrench, to pull larger plants (up to about 2 inches in diameter), or cutting and chemically treating the stumps of Buckthorn greater than 2 inches in diameter (always follow product instructions for mixing and applying any herbicide).

Weed Wrenches

Two of the Weed Wrenches are now available for Ramsey residents to check out to assist with managing and eradicating Buckthorn. This tool can be checked out for two weeks. A $25 deposit is required to help ensure that the weed wrench is returned clean and in working condition. If interested in checking out one of the Weed Wrenches, please call the Community Development Department at 763-433-9824. Please note that a signed waiver form and safety glasses (provided by the City) are required.

Read more about buckthorn and learn how you can remove buckthorn.

Photo credit lcinvasives.org

Photo Common Buckthorn bush with oval leaves and round berries

Tatarian Honeysuckle (Lonicera Tatarica)

Tatarian honeysuckle is a multi-stemmed, deciduous shrub growing to 10 feet tall. It can be easily confused with similar species like Bell’s, Morrow’s, or Amur honeysuckles, all distinguished by slight differences in flower color and leaf pubescence.

Tatarian Honeysuckle impacts:

High densities of honeysuckles can suppress native plant and timber regeneration and form monocultures. Ecosystem richness and density of tree seedlings are substantially reduced in honeysuckle infestations. This species can alter a habitat’s microclimate by creating dense shade, depleting soil moisture and nutrients, and possibly releasing allelopathic chemicals that inhibit the growth of other plants. It can be especially harmful to spring ephemerals, due to its early leafing.

Read more about Tatarian Honeysuckle

Photo credit Shadowmeld Photography

Photo Tatarian Honeysuckle shrub with small round berries