Life cycle: summer annual
Growth habit: grows 1 to 4 ft., erect, and branching; leaves pinnatifid, deeply dissected, fern-like; foliage similar to mugwort, but not chrysanthemum-scented and not from rhizomes; ragweed pollen is the primary cause of hay fever
Reproduction: by seed; green flowers inconspicuous, in terminal clusters
Conditions that favor growth: common in cultivated crops, orchards, roadsides, meadows, etc.; clay or sandy soil but prefers heavy, moist soils
Cultural control: does not tolerate frequent mowing
Still have a question? Contact us at Ask Extension.