Invasive Species

There are several invasive plant and tree species present in Mendota Heights. Invasive plant and tree species are species that are non-native, or alien to Minnesota that outcompete and inhibit native vegetative communities by taking away light, water, and nutrients that native species would normally receive. Invasive species can negatively affect our natural environment, economy, and sometimes the health of wildlife and people.  These species often reproduce rapidly, and have no native insect or animal populations that consume them, leaving them free to spread uncontrollably.

The best way to control invasive species is to prevent the spread of new invasive species to un-infested areas. You can help prevent the spread of invasive species by:

  • Ensuring belongings, clothing, tools, and supplies are free of dirt, mud, and plant debris before transporting them.
  • Identifying and utilizing local sources of certified firewood and weed-free hay, compost, and mulch.
  • Leaving unused firewood and plant material onsite or at home. Do not transport plant material or firewood!

If you believe you have an invasive plant or tree on your property, you may contact City Staff (contact information below), or a tree care or restoration professional for help in positively identifying invasive species and recommended control methods. The following are some of the common invasive plant and tree species that you may find on your property and options for removal and management. A full list of invasive species present in Minnesota can be accessed through the MN Department of Natural Resources website.

Early Detection Species: These are invasive species that are not present or have limited presence in Minnesota, but should be reported to the Minnesota Department of Agriculture in order to prevent their spread. Call “Arrest the Pest” at 651-201-6684 (metro) or 1-888-545-6684 (toll free) or email Monika Chandler, Weed Program, or call at 651-201-6537.

Common Invasive Species: The following are common invasive and/or noxious weed species found in Mendota Heights and Minnesota, and possible methods of control.

Special Note Regarding Herbicide Use: Always read the instructions included with your herbicide, and wear personal safety gear, such as gloves and eye protection. Never use herbicide near water, in windy conditions, or during or right before rain events.

Field bindweed (Convolvulus arvensis) is an invasive perennial in the morning glory family with an extensive rhizomatous and deep root system. It has alternate, arrowhead shaped leaves and simple trumpet-like white flowers. Bindweed has seeds that can remain viable in soil for several decades, and can invade gardens, prairies, and wet areas by growing rapidly and intertwining with, and chocking out, native species.

Visit the Gardening Know How website.

Control Methods:

  • Hand pulling or tilling where small populations exist
  • Using competitive species to shade out plants and mulching to control seed germination
  • Selective herbicide use when not in close proximity to native or desirable species, using glyphosate or a 2, 4-D and glyphosate combination (2, 4-D alone is generally not effective)