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Pollenservice Wien

The annual review of the 2025 pollen season is online!

The Pollen Service Vienna at MedUni Vienna has once again published the annual review of the past pollen season in Vienna, comparing it with the long-term average (period 1991–2020) and providing a seasonal ranking based on the annual pollen integral. 

We provide here pollen forecasts and recommendations, that are based on our scientifically evaluated data and our expertise. It is our aim to inform persons concerned by pollen allergies in Vienna in a most comprehensive, accurate way and free of charge.

Current pollination

FRIDAY, 21. NOVEMBER
Pollen types:

LEGEND

Hardly/no pollination
Pollination
high pollination

Due to current cause:

Flower development of early flowering trees and shrubs: The catkins of the common hazel (left) and the catkins of the birch (right).

Although the early-blooming trees and shrubs in Vienna are currently preparing for their winter dormancy, the catkins are already being prepared for next year. The male catkins produce pollen and are formed in the summer. They continue to grow considerably until they start to flower. Continuous phenological observations are necessary to record both the timing and intensity of flowering.

The Pollen Service Vienna at MedUni Wien is staying on top of things.

 


Photo: Fallen leaves of ginkgo - leaf with raindrops

Pollen and spore season finally over!

The late-autumn weather no longer allows for pollen release. Also fungal spores (Cladosporium, Epicoccum, Alternaria) are only detected sporadically in the air. With that, considerable concentrations are no longer expected and this year's allergy season ends.

You can find the typical pollen seasons in our pollen calendar.

The GeoSphere Austria is our partner for weather forecasts and weather data. We are grateful for the professional interchange and the cooperation.

Video Highlight: Ragweed (Ambrosia) pollen from the plant to the microscope slide

Play
At the beginning of the ragweed pollen season, pollen can be obtained particularly easily from mature inflorescences (©Maximilian Bastl (MedUni Vienna/Pollenservice Vienna)).

Here you can see the process of embedding ragweed (Ambrosia) pollen. A panicle that is already flowering is tested in the field for pollen release and packaged. In the laboratory, individual flowers are then embedded on a microscope slide and the ragweed (Ambrosia) pollen is examined under the light microscope.