Giant Ragweed is a robust plant that can grow over 10 feet tall. It has large, lobed leaves and produces significant amounts of pollen, contributing to seasonal allergies.
Best time to see a Giant Ragweed
The best time to see a Giant Ragweed is June–September, when about 61% of U.S. sightings happen, based on 45,310 research-grade iNaturalist observations.
Not certain it is a Giant Ragweed? What plant is this? walks through what to check first and the lookalikes that catch people out.
Recent Giant Ragweed sightings near you
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