Forecast

The hazel and alder blossom is slowly coming to an end, but is still causing problems!

The fine weather is still continuing this week, allowing pollen to fly unhindered. In the Weinviertel, in the Danube region and in the lowlands of the industrial district hazel and alder have already passed their flowering peak. At higher altitudes in southern Lower Austria and in the Waldviertel, they still have the potential to produce dust. People who are sensitised to these two early bloomers must continue to be prepared for a moderate to high pollen load.

In the regions mentioned above, hazel and alder are already shedding their catkins. Due to the temperature-related delay in the start of flowering in the Waldviertel and in the Limestone Alps, higher hazel and alder loads must be expected here than in the lowlands. In parks and gardens, the corkscrew hazel additionally dusts and locally increases the exposure to hazel pollen. Hazel and alder are closely related to the birch related to the birch. People who are sensitised to birch can therefore have cross-reactions.

With the sunny conditions and spring-like temperatures, the number of flowering and flowering ash trees will increase over the course of the week. ash trees will increase. By the end of the week, pollen concentrations will increase from a low level to a moderate level.

The fluffy catkins of the Sal willow, popularly known as pussy willow, are also currently in bloom. Their pollen is categorised as moderately allergenic. Allergy sufferers who are allergic to willow and poplar should not place the branches of this pre-Easter herald of spring in their rooms.

In the pollen spectrum yew,elmand cypress plants have been detected in the pollen spectrum. In Lower Austria, the pollen load from these early bloomers is low to moderate.

From a current perspective, the data from our birch flowering readiness model indicate that it will be reached in the second half of March.

Forecast from 2026-03-09

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.