Biennial & Perennial Weeds
HOGWEED, GIANT *T* Heracleum mantegazzianum Life Cycle: Perennial Plant Description:
An erect very tall growing perennial. Deeply cut leaves can be as much as five feet wide. Produces a flowering stalk 10 to 15 feet tall with large clusters of tiny white flowers 2½ feet across. Stalks reach 2 inches in diameter and are
hollow with purple mottling. Contact with the sap in the presence of sunlight can produce painful, burning blisters. Treatment: Management of giant hogweed requires careful handling and appropriate
personal protective equipment. Apply 16 to 20 fluid ounces of DuraCor ® herbicide per acre. Treat early in the spring when plants are in the rosette stage for best control.
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