Department of Agriculture
Julius Johnson, Commissioner

Exotic Plant Removal

Exotic plants are those not native to the area.  During the 19th Century, people ordered a wide variety of new plants for their gardens which then spread to the surrounding countryside.  Others hitchhiked in as regional and global trade became more widespread.  A few, such as kudzu vine, were well-meaning experiments gone awry.

In a healthy ecosystem, the delicate balance of producers and consumers has been worked out slowly over time.  Exotic plants often spread out of control in a new environment.  They crowd out native plants, reduce the biological distinctiveness of an area, and--in the case of duckweed or musk thistle--may present hazards to people and their activities.  An area twice the size of Delaware is lost to invasive plants each year in the United States.  Invasive species of all types, including animals, are estimated to cost $137 billion annually in losses to agriculture, forestry, fisheries, and the maintenance of open waterways in the United States.

Common exotic plants found at the Ellington Agricultural Center include bush honeysuckle (see above) and Chinese privet (see right) which have been mainly responsible for turning what should be open woodland vistas into impenetrable walls of foliage. 

Dense mats of multiflora rose that once blanketed the area around Edmonson Pike have already become less common but are a stubborn plant pest requiring considerable effort over an extensive period to eradicate.

Other common exotics slated for intensive management include mimosa, Queen Anne's Lace, musk thistle and Asiatic dayflower.

In the Sevenmile Creek area, Chinese privet and bush honeysuckle formed an almost impenetrable mat along both sides of the habitat trail.  People who are unfamiliar with the normal appearance of woodlands might think it gave the area a lush, green look.  In actual fact it was smothering the forest floor.  This photograph of a mature hardwood forest (see left) shows clearly that a forest floor is just that...a floor.  Certainly it is not a manicured monoculture of grass like a suburban lawn, but it is also open and inviting, permitting sweeping views of the surrounding landscape.

Removing exotic and invasive plant pests may be hard work, but it is definitely worthwhile.  Follow these eight guidelines consistently for best results:

• Learn the invasive plants common in your region
• Identify the invasive species on your property
• Resolve not to bring additional invasive plants into your outdoor space
• Determine what could fill the space now occupied by invasive species
• Choose a method for removal that is effective and within your resources
• Select a manageable plot size to tackle and keep at it
• Repeat the removal process as necessary
• Be vigilant in keeping the old pests--or new ones--from cropping up

We handle Chinese Privet and Bush Honeysuckle by cutting them even with the ground during the early Fall sap drop or in the dead of winter, then painting the stump with Roundup or an equivalent per label instructions.  Plant debris is disposed of so seeds will not be spread to other sites.

Grateful acknowledgment goes to the National Audubon Society for use of some of the materials in this section.

Encouraging Native Plants

The Ellington Campus is home to a number of native plants ranging from tiny bluets to huge American pokeweed.  The best place to see wildflowers en masse is at ten acre meadow.  Tall, yellow wingstem (top picture) is the dominant flower, with close runners up purple ironweed (bottom picture) and white common yarrow. 

Some of the more interesting plants require more patience or closer examination to find.  People are often surprised to see how showy and interesting some of the tiny blossoms are.  Even "heads" of clover are collections of orchid-like trumpets.  Blue mistflower is one plant that deserves a closer look, and mock strawberry adds some flecks of crimson to the ground cover though their fruits are not edible.

Our approach to native plant restoration at Ellington involves three things: removal of invasive exotic plants that crowd out natives, reducing mowed acreage, and reintroducing some of the more interesting lost species. 

Please help us restore their habitat by staying on the trail system and not removing plants.  Also use caution when handling plants you can not identify.  Some may cause a rash, others harbor large numbers of chiggers or attract stinging insects that may become aggressive when disturbed.