While many people believe hay fever is a spring problem, in Britain the season now lasts from March until the beginning of October – which is a long time if you’re allergic to all types of pollen.
Temperature and rainfall patterns mean pollen severity changes from year to year.
But tree pollen is generally the culprit between March and May, then grass pollen takes over and affects sufferers from mid-May until July. After that, weed pollens take over until the autumn.
