Forecast

Hazel and alder are still dormant!

The inflorescences of hazel and alder are currently still in a dormant phase, so there is currently no pollen count. The temperature level in Styria will remain predominantly low in the coming days.

Only in thermally favoured locations could there be the first local impacts in the short term. The purple alder planted in urban and local areas is responsible for this. The reference plants in Graz are heavily covered with inflorescences and can produce dust in dry weather conditions.

In the alder species that are widespread in Austria(black and grey alder), the catkins are still firmly closed and therefore cannot yet release any pollen. This also applies to the tree and shrub hazels.

The cold spell also has an impact on the flowering readiness model. From a current perspective, the data tends to indicate that flowering readiness will be reached between the beginning and middle of February.

Forecast date: 2026-01-30

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.