Possible flowering times of pollen allergy triggers (main trigger underlined)
month |
Pollen species |
January |
Hazel, alder, depending on region Cypress |
February |
Alder, hazel, willow, cypress |
March |
hazel, alder, poplar, elm, willow, hornbeam, ash, yew, rarely thuja, rarely grass |
April |
birch, oak, alder, ash, lilac, grasses, hornbeam, hazel, poplar, rape, copper beech, elm, willow, meadow foxtail, douglas fir, juniper, thuja |
May |
birch, grasses, ash, lilac, barley, oats, hornbeam, black elder, hops, pine, lime, plane, robinia, rye, rape, red beech, ribwort, meadow foxtail |
June |
grasses, nettle, goosefoot, hornbeam, black elder, privet, lime, corn, rape, rye, robinia, ribwort |
July |
Grasses, mugwort, nettle, goosefoot, glasswort, privet, maize, rape, rye, ribwort plantain, rarely grapeweed, |
August |
Mugwort, ragweed, nettle, goosefoot, glasswort, grasses, corn, rye, ribwort, meadow fescue |
September |
mugwort, ragweed, nettle, goosefoot, glass fever, smooth oat, grasses, corn, ribwort, meadow fescue |
October |
nettle, goosefoot, glass cabbage, grasses, ragweed |
| November | Rarely still grasses; mugwort, nettle |
| December | hazel, alder (depending on weather conditions) |