Pollen Zones
Pollen counts vary from region to region in the U.S. Use the pollen zone map to determine when tree, grass and weed pollens are at their worst in your area.
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Hide CaptionShow CaptionEastern Interior Pollen MapAll About
Trees February to June
Grasses April to July
Weeds May to October
Grasses April to July
Weeds May to October
Find out which plants may be making you sneeze: Allergenic Plants
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