– smooth crabgrass
Distribution: Most of southern Canada, and all of the United States except the extreme southeast and southwest.
Habitat: Lawns, roadsides and wastland, usually where moist.
Origin: Introduced from Eurasia
Flowers: July - September
Growth Duration: annual
– hairy crabgrass
Distribution: A weed in most of the United States.
Habitat: Lawns, gardens, and wasteland.
Origin: Introduced from Eurasia
Flowers: July - October
Growth Duration: annual