Forecast

Weather conditions prevent pollen count!

Temperatures above 0 °C are rarely expected in the coming days. Allergy sufferers can therefore look forward to a few days of relief.

Only in thermally favoured locations can there be local stress in the direct vicinity of purple alder. As in previous years, the catkins of this alder species are already ready to flower around Christmas. Most of the catkins on our reference plants are ready to flower, some have even already finished flowering. As soon as the temperatures next break the 5 °C mark, the species that are ready to flower can start to release pollen.

As the purple alder is a cultivated hybrid, these trees are less common than the native grey or black alders. The catkins of these species are still dormant and need a few more hours of sunshine before they are ready to flower.

This also applies to the tree and shrub hazels, which are early bloomers.

If we look at the forecast model for when hazel and alder will be ready to flower across the whole area, we can currently expect flowering to begin in early February.

However, these dates are still subject to a certain degree of uncertainty and are heavily dependent on the weather conditions in the coming days. The closer we get to the actual flowering period, the more precise the calculated data will be.

Forecast date: 2026-01-05

Note: The data shown here are model data for the expected start of flowering. For more detailed information on the expected pollen count, please refer to the text forecasts.