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 ...

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.

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

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 ...