Spotted Knapweed

FS-SpottedKnapweedPrimarily a biennial plant – producing arosette the first year and a flowering boltthe second – but can also be a short-livedperennial, blooming for a few years beforedying. Spotted knapweed can self-pollinateand is also cross-pollinated by insects. A prolific seed producer – individual plantscan produce over 140,000 per year – controlis extremely difficult on established infestations.

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