Giant Hogweed

Heracleum mantegazzianum

Biennial or perennial; stems are hollow, dark reddish-purple in color, and covered in sturdy bristles. Flowers in its final year (2-5 years), many white flowers clustered in an umbrella-shape. Large (up to 5’ wide), lobed leaves with toothed margins.

Plant Details

Habitat NotesMoist disturbed sites, roadsides, ditches, along streams and open woodlands.
Mature Height6’-16’
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