Pollen Chart

Pollen seasons in Canada

Feb March April May June July Aug Sept
Atlantic provinces     Trees TreesGrass TreesGrass Grass Ragweed Ragweed
Québec   Trees TreesGrass TreesGrass TreesGrass TreesGrassRagweed Ragweed Ragweed
Ontario   Trees TreesGrass TreesGrass TreesGrass TreesGrass Ragweed Ragweed
Manitoba   Trees TreesGrass TreesGrass TreesGrass TreesGrassRagweed Ragweed Ragweed
Saskatchewan / Alberta   Trees TreesGrass TreesGrass TreesGrass TreesGrass    
British Columbia Trees Trees TreesGrass TreesGrass TreesGrass TreesGrass    
  • imageTree
  • imageGrass
  • imageRagweed