Native to Europe, known as common ragwort there. Produces huge numbers of seeds carried by air, can be a very rampant invader of waste gr...Read Moreound, meadows etc having the ability to almost completely take over large tracts of land. thrives on various soil types including dry areas with poor soil. A bit sporadic in where it occurs though, being dependent on the wind to disperse seeds.
Poisonous to horses and cattle, less so to sheep which may eat it.
A favourite food of the Cinnabar moth.
The term 'tansy ragwort' is incorrect and causes confusion, Tansy is a separate species entirely though there is a slight resemblance between the two species, both having bright yellow flowers. 'Ragwort' or 'common Ragwort' is the proper name for this species.
I want to say something in the defense of this beautiful wildflower. In the right place it is a very valuable plant, a very rich nectar ...Read Moresource for hoverflies, bees, butterflies, moths etc..
St. John's, NL (Zone 5b) | February 2005 | neutral
It is a noxious weed but it is a great plant for butterflies and bees. If you have a wildflower garden, then I would not be against grow...Read Moreing this plant. Cut the heads off as soon as the flowers have passed and you will prevent their self-seeding everywhere. This plant only reproduced by seed, not by rhizomes.
Woodland Park, CO (Zone 4b) | November 2004 | negative
Colorado Class A Noxious Weed. Mandatory eradication.
All locations of this plant in Colorado should be immediately reported to th...Read Moree Colorado Department of Agriculture.
Out here on the Oregon Coast tansy is extremly invasive, the forest service has released a moth of some kind that eats it to help control...Read More it. It is very poisonous to horses, and the symptoms may not show up for years, I believe it eats away at their liver and kidneys. It's flowers aren't worth the pain to keep it in check, and to keep the animals away from it.
Highly poisonous. Invasive in untilled soils. Designated by many governments as injurious weed and controlled by legislation. Can cause...Read More extensive losses to cattle an horse farming. Can cause death to humans by ingestion or skin absorption leading to liver failure, cirrhosis or cancer.
Contains many Pyrrolyzadine Alkaloids
Native to Europe, known as common ragwort there. Produces huge numbers of seeds carried by air, can be a very rampant invader of waste gr...Read More
I want to say something in the defense of this beautiful wildflower. In the right place it is a very valuable plant, a very rich nectar ...Read More
It is a noxious weed but it is a great plant for butterflies and bees. If you have a wildflower garden, then I would not be against grow...Read More
Colorado Class A Noxious Weed. Mandatory eradication.
All locations of this plant in Colorado should be immediately reported to th...Read More
Out here on the Oregon Coast tansy is extremly invasive, the forest service has released a moth of some kind that eats it to help control...Read More
Highly poisonous. Invasive in untilled soils. Designated by many governments as injurious weed and controlled by legislation. Can cause...Read More