Weed of the Month: Canada Thistle

Can YOU outsmart the smartest weed in the West? Canada Thistle, Cirsium arvense, may be the cleverest weed West of the Mississippi. It boasts a long list of weedy characteristics, including: Perennial growth habit Ability to reproduce from creeping rhizomes (underground stems that creep out laterally in all directions) An abundance of wind-dispersed seeds that … Continue reading Weed of the Month: Canada Thistle

Weed of the Month: Spotted Knapweed

Spotted knapweed (Centaurea maculosa) is blooming and suddenly seems to be everywhere.  It’s grey-green wiry foliage help it blend into surrounding vegetation until its pink flowers appear. Then suddenly we see the vast extent of its infestation. Spotted knapweed is in the aster family, along with many other noxious weeds including Oxeye Daisy, Scentless Chamomile, … Continue reading Weed of the Month: Spotted Knapweed