DK russian knapweed Custom 
 Diffuse Knapweed
  • Aster family
  • Biennial/short-lived perennial
  • Reproduces by seed only
  • Flowers white-purple
  • Bracts surrounding flowers have four or five lateral spines with one long terminal spine
  Russian Knapweed
  • Aster family
  • Perennial
  • Reproduces by seeds and creeping roots
  • Flowers are lavender to pink to white
  • Flowers from June to August
  • Flowers are lavender to pink to white
  • Flowers from June to August
 SK  
 Spotted Knapweed
  • Aster family
  • Short-lived perennial,  rarely biennial
  • Reproduces by seed
  • Flowers pinkish-purple, rarely cream
  • Floral bracts tipped with dark comb-like fringe