Weed-Diffuse Knapweed

Diffuse Knapweed
Centaurea diffusa

• grows 1-1/2 to 2 feet tall
• flowers are mostly white and solitary
• when plant is young, the leaves have a knap which becomes rough with age
• has a sharper spine at the end of the bract (modified leaf just below the flower)
• produces 400 to 900 seeds the second year and lives up to four years in the same location
• control goal is to prevent the production of seed