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Kalamazoo College

Invasive Species

An invasive specie is a plant, fungus, or animal specie that is not native to an environment, and has a tendency to spread to a degree causing damage to the environment, human economy and human health. These species have the ability to thrive and spread aggressively, and can take over a majority of the Arboretum, if proper control and treatment isn't implemented.

The Arboretum is home to the following invasive species (click the link for more information):


Arb crew currently works on controlling Japanese Knotweed, Garlic Mustard, Oriental Bittersweet and Multiflora Rose. The amount of Japanese Knotweed in the Arb has decreased significantly in recent years due to the effective cut and treat (with diluted herbicides) method that has been utilized. This same cut and treat method has been used in an effort to control Oriental Bittersweet and Multiflora Rose. Garlic Mustard does not require treatment, and is instead pulled out by the root.

 Arb Crew managing invasive species


This map details the areas in the Arboretum where various invasive species have once been prominent.

Invasive Species Map