Today, it is considered invasive in North America.
If you have common tansy growing on your property, it is best to eliminate it.
The leaves of the common tansy are toxic to humans, pets, and livestock.
Common tansy grows in full sun to part shade.
It reproduces fast by seeds and rhizomatous roots.
Because it grows so densely, the production of forage plants that livestock can feed on is significantly reduced.
The plant has green, fern-like, or feathery alternate leaves.
But be careful to time the mowing before seed production, or it will only spread the seeds.
Tansy ragwort has flowers resembling yellow daisies with 13-ray petals and yellow centers.
Both plants are noxious invasive weeds.
Tansy flower was traditionally used to make different medicines.
Research supporting medicinal uses is sparse, and it is primarily considered toxic.
Historically, the tansy plant was used as an insecticide.
Recent research suggests that distilled oil from the plant is effective in repelling mosquitos.
United States Department of Agriculture.
Indiana Plants Poisonous to Livestock and Pets.
Cooperative Extension Service, Purdue University.
North Carolina State University Cooperative Extension.
Tanacetum Vulgare.Missouri Botanical Garden.
State Noxious-Weed Seed Requirements Recognized in the Administration of the Federal Seed Act.U.S.
Weed Control in Natural Areas in the Western United States.
Common Tansy Identification and Control.King County, Washington.
Montana State University Extension.
