Spotted knapweed (Centaurea stoebe) is a biennial or short-lived perennial native to Eastern Europe. It was introduced into ...

Spotted knapweed is a prohibited noxious weed, meaning a land owner is legally obligated to control it on his/her land. Spotted knapweed grows well in dry sandy soils. Spotted knapweed grows 1 ...

Russian Knapweed (Rhaponticum repens) is a creeping perennial native to Eurasia. It was introduced into the U.S. as a ...

The Minnesota Department of Agriculture is alerting farmers and other landowners about spotted knapweed ? a nasty weed that is showing up with increasing frequency in parts of Minnesota.

Purple deadnettle, bull thistle, purple loosestrife, ground ivy, burdock, spotted knapweed, and lespedeza are some such examples. While it's tempting to retain surprise ornamental visitors in your ...