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Thistle – Bull
Family: Asteraceae Structure: Erect, 2-5 feet tall with many spreading branches, spiny wings from leaves. Life Cycle: Biennial, reproducing by seed only. Rosette formed first year; flowering stem elongates second year. Leaves: Green, sparsely hairy with short prickles on the surface and cottony below. Margins have sharp spines. Leaves in the first year form a rosette. Flowers: Dark purple, 1½–2 inches wide. Terminal, more or less clustered. Roots: Short fleshy taproot. Treatment: Application Timing: Apply in the spring and early summer to rosette or bolting plants or in the fall to seedlings and rosettes before ground is frozen. Use higher rates after bolting through early flower. Recommendation: |
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