Grass pollen
Grasses pollinate from late spring into summer, and for most of the year where winters are warm. 3 guides, each with its sources.
Today across our metrosHighest level in any metro, and how many metros reach it
Source: Includes pollen data from GoogleIncludes data from Google Maps
Get pollen alerts for your metro by email
PoaceaeGrassesGrasses cause most late-spring and summer pollen allergy symptoms in the US. Northern and southern grasses differ in where they grow and which allergens they carry.Cynodon dactylonBermuda grassBermuda grass is a warm-season southern grass with a long pollen season. It often releases pollen year-round and is common in the southern states.Phleum pratenseTimothy grassTimothy is a cool-season hay and pasture grass found in all 50 states. It is one of the common northern grasses whose summer pollen can cause hay fever.