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Spotted Knapweed

Summarized by Plex Health
Last Updated: 24 April 2022

Spotted knapweed gets to a height of 2 to 4 feet when fully mature. Flowers are pink to light purple and the petals are bordered by stiff, black-tipped bracts. Flowers create brown seeds of less than 1/4 inch long. Spotted knapweed duplicates mainly by seed. Seedlings will develop into a rosette of leaves in the loss and resume growth in the springtime. Spotted knapweed was offered the United States from Europe and Asia. Now spotted knapweed can be found in dry pasture sites, oak and ache barrens, and on lake dunes and sandy ridges. Numerous million acres of grazing land in the northwestern United States and Canada are infested.

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