Forecast

Update end of November: Catkin density in Spaeth's alder and hazel

At the moment we are not recording any relevant pollen counts at our station. We are therefore still in the relief phase for pollen allergy sufferers. However, our team is still active and regularly carries out phenological observations on reference plants to get a first impression of the coming season.

Hazel is showing signs of a slightly below average season. This is due to the low number of catkins on our reference plants. At the moment, the catkins are still firmly closed and are not able to release any pollen.

The Spaeth's alder seems to have an average number of catkins. The development of the catkins is slightly more advanced than that of the hazel catkins, but no pollen has yet been released. Due to the relatively limited distribution of this ornamental tree, an intense allergenic load during the flowering period of Spaeth's alder is only to be expected in the immediate vicinity.

Representative model data for the start of hazel and alder flowering across the country is expected to be available by mid to late December.

We will of course continue to monitor the situation and keep you informed of any changes!