Toxicity | Non-toxic. |
Control | Cultivation, biological and aquatic herbicide. Contact your County Weed District or local Applicator for more information. |
Habitat | Riparian areas including sub-irrigated pastures, cropland, ditch banks, lakes and rivers. |
Root | Extensive root system. |
Leaf Shape | Lance-shaped with smooth edges. |
Lifespan | Perennial; two years or longer. |
Priority 1B Weed | Limited presence in Montana. |
Similar Looking Plants | Blazing star and fireweed. |
Important Information | Plants emerge in very early spring and have bloomed and set seed by mid-summer. The plant was introduced as a medicinal herb and an ornamental. One mature plant can produce more than 2 million seeds annually. |