Johnsongrass is an aggressive perennial grass introduced from the Mediterranean that has become one of the most widespread invasive plants in North America. Despite its invasive status, its seeds are consumed by many songbirds and ground-feeding birds. It forms dense stands along roadsides and in agricultural areas across the southern half of the continent.
Best time to see a Johnsongrass
The best time to see a Johnsongrass is April–August, when about 64% of U.S. sightings happen, based on 19,643 research-grade iNaturalist observations.
Not certain it is a Johnsongrass? What plant is this? walks through what to check first and the lookalikes that catch people out.
Recent Johnsongrass sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spotted a Johnsongrass?
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