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Hairy galinsoga (Galinsoga quadriradiata) is a highly invasive annual that grows 4 to 30 inches tall. It prefers warm, nitrogen-rich, heavy soils. Plants are coarsely hairy with many branches. Coarsely toothed, simple leaves are also hairy and oppositely arranged on stems.

Hairy galinsoga in bloom.

(Photo: Bruce Ackley, The Ohio State University, Bugwood.org)

Management:

• Mulch and pre-emergent herbicides prevent seed germination, while tillage and post-emergent herbicides destroy plants.

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