Accent on Natural Landscaping

Donna VanBuecken

  • Home
  • About Me
  • Resources
  • Organizations & Blogs
  • Archives
  • Contact

Buckthorn – Invasive Plant

March 1, 2017

In 2008 when Wild Ones moved into the WILD Center, this is what the edge of our woods looked like. That’s Common Buckthorn (Rhamnus cathartica) at the base of a predominantly Green Ash (Fraxinums pennsylvanica) woodland.

Buckthorns of the genus (Rhamnus) are an invasive noxious species from eastern Europe and Asia. They grow prolifically throughout much of the northern states. They are the last trees to lose their leaves in the fall, so non-native plant enthusiasts are typically pleased to see that bit of green before the snow begins to fall.

BUT, buckthorns are one of the biggest factors in the desecration of our woodland habitat.

Note the mass of tree roots shown in this illustration by John Klossner. No wonder nothing can grow under a buckthorn canopy.

 

 

Their root systems are dense and shallow, so they use up all the nourishment in the surrounding area and prevent other plants — native or otherwise — from growing in their understory. Their berries can lay dormant in the ground for up to 7 years producing more new seedling buckthorns whenever conditions are right.

Buckthorn, Birds & Diarrhea — although there is some disagreement regarding the effect of buckthorn berries on the guts of insects and birds, it is generally thought most are not able to break down the metabolite known as anthroquinone. If not broken down, anthroquinone produces emodin, a cathartic which causes diarrhea and often leads to dehydration and then death of the insect or bird. If a bird manages to survive eating the berry, it of course poops out the seed in some other habitable location and a new invasive noxious buckthorn is allowed to germinate and grow.

Pullerbear manufactures several sizes of tree and root pullers to use in eradicating buckthorn. The original weed wrench is no longer manufactured. Graphic by John Klossner.

Eradicating buckthorn is not a fast undertaking. Tackle the largest specimens — the ones that are producing black berries – first. I have found cutting and painting the stem of the larger trees with 50% concentrated Poison Ivy Roundup works pretty effectively. Note:  You must paint the cut end immediately after cutting down the tree; before the sap starts to cover the wound. Fall is the most effective time to cut and paint — when the tree is pulling all the nutrients down into its roots for winter dormancy.

Pulling small seedlings is easy, but often counter-productive because one simply exposes dormant seeds to sunshine and moisture, producing the perfect conditions for a new seedling to germinate.

Girdling large trees works pretty well also. In the late spring, after the nourishment has moved from the roots to the branches and the leaves, cut carefully around the base of the tree. Once it has no way to get nourishment back and forth between the branches and the roots, it will begin to die. Girdling too early in the spring, however, will simply allow the tree to form suckers.

Wild Ones has the perfect t-shirt for you. This design by illustrator John Klossner is printed on both white and bright yellow t-shirts. Here’s an easy way to promote eradication of buckthorn.

So, it’s time to think about tackling the buckthorn in your yard. Think of it as good exercise! And don’t forget to plant a native tree or shrub or some native plants in its place. Here’s a fact sheet which includes suggested alternatives for you to think about. Have fun!

To purchase a Wild Ones Die, Buckthorn Scum t-shirt.

For more information about a variety of non-native invasive plants

   Send article as PDF   

Comments

  1. Brenda Longworth says

    September 5, 2017 at 7:39 am

    We are removing buckthorn from the bike trail in our town. Pulling the small, cutting and treating the bigger ones. I was wondering if buckthorn will grow back from broken roots. Thanks!

    Reply
    • Donna VanBuecken says

      September 5, 2017 at 9:13 am

      Hi! Brenda — to my knowledge, buckthorn does not grow back from broken roots. It sprouts back from cut stems which have not been treated and it grows from seed exposed to the right germination conditions. Here’s a really good article on eradicating buckthorn from Ecological Landscaping Alliance.

      Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Signup button.

Recent Posts

  • OVER-THE-COUNTER NATIVE PLANT SALE MAY 21
  • WOFVA’s NATIVE PLANT SALE MAY 21
  • Recovering America’s Wildlife Act (RAWA)
  • Wisconsin Conservation Hall of Fame 2022 Inductees
  • Native Landscaping Design

Category Archives

  • Biodiversity
    • Monarchs
    • Pollinators
  • Birds
  • Climate Change
  • Events
  • Fire
  • Funding
  • Garden and Landscape Design
  • Heroes
  • Homestead
    • Recipe
  • Invasive Plants
  • Native plant garden design
  • Native Plants
  • Natural Landscaping
  • Prairie
  • Public Comment Opportunity
  • Railroad
  • The Sky
  • Wellbeing
  • Wetlands
  • Wildflowers
    • Trees & Shrubs
  • Wildlife
    • Wolves
  • Wisconsin
  • Women
  • Woodlands

Copyright 2005-2018
Donna VanBuecken