Hay fever calendar runs longer than ever: in which month do you suffer from which plant (s)?

Hatsjoe! It is nice spring weather with sun, pleasant temperatures and – unfortunately for people with hay fever – also a lot of pollen in the air. Where we used to have a few winter months, the hay fever season now runs almost all year round. When do we suffer from which plant (s)? Biologist Arnold van Vliet takes us from month to month.

ttn-43