the plants
every pollen, by plant.
The plants in Google’s pollen forecast, each drawn by hand, with when it usually flowers in the US. Seasons shift by region and year; the forecast for your area is what counts.
In the US forecast
OakTree · March to May
BirchTree · March to May
MapleTree · February to April
GrassesGrass · April to August
RagweedWeed · mid-August to the first frost
ElmTree · February to April, and September to October for Southern elms
AshTree · March to May
AlderTree · January to April
CottonwoodTree · February to April
JuniperTree · December to April
PineTree · March to June
