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Pollenservice Wien

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

TUESDAY, 25. JUNE
Pollen types:Grasses, Fungal spores, Nettle family

LEGEND

Hardly/no pollination
Pollination
high pollination

Due to current cause:

The flower of ornamental grasses has already started. Here you can see the blooming fountain grass (left) and the blooming Chinese silver grass (right)

Although the main grass pollination period in Vienna is over, planted ornamental grasses in urban areas are not uncommon and can extend the season for affected individuals into autumn. Whether in flower boxes, perennial beds, along streets, in new construction areas, or in private gardens; ornamental grasses are popular in Vienna and are often used for decorative purposes. Most ornamental grass species are heat-loving and bloom in late summer and autumn. Well-known ornamental grasses are the fountain grass (Pennisetum), the pampas grass (Cortaderia) and the Chinese silver grass (Miscanthus). Due to the high cross-reactivity rates within the sweet grass family, they are relevant for grass pollen allergy sufferers.

Photo: Important sources of pollination: sweet chestnut tree (left) and the grasses with ryegrass being a dominant grass species (Lolium perenne; right)

Mid- and long-term forecast for Vienna
This forecast gives you an overview for a longer time period so that you can improve your planning.

The flower of grasses is rapidly progressing, first ornamental grasses are already flowering!
The main pollination period of the grasses in Vienna is coming to an end. Noticeable pollen concentrations are still being measured but are no longer reaching high values. In the meadows of Vienna ryegrass (Lolium perenne) is still dominant, although its main pollination period has passed. The flowering of reed grasses (Calamagrostis), couch grasses (Elymus) and bent grasses (Agrostis) is also coming to an end. The pollination period of ornamental grasses started earlier than usual in Vienna and will accompany grass pollen allergy sufferers into late summer. Ornamental grasses are increasingly found in urban areas, extending the grass pollen season noticeably. The pollen concentrations are higher in the vicinity of flowering meadows and forest clearings. Flowering forest grass species have to be expected in forests as well.

Dock and plantain are flowering in Vienna’s meadows and grass verges as well. Higher pollen concentrations have to be expected especially near unmown sections of meadows. The measured pollen concentrations were and still are average for this time of the year.

The sweet chestnut tree is also flowering in Vienna but the values already decreased. Symptoms may reoccur in birch pollen allergy sufferers, as the high similarity of the main pollen allergen of the sweet chestnut tree to birch pollen can lead to cross-reactions.

Pollen of the nettle family is observed in our pollen trap and reaches high concentrations under favorable weather conditions.

Fungal spores are present in high quantities in the air. This situation will last since they benefit from the summer-like weather and moist and warm conditions. Concentrations attain high levels, especially during sunny periods following rainfall. Currently, spores of the genera Cladosporium and Alternaria are mainly found in the Vienna pollen trap.

Pollination profile

Grasses:

  • state of the flower: end of the flower/pollination
  • trend: constant
  • time of the start of the flower: earlier than average

Fungal spores:

  • state of the season: main season/high concentrations
  • trend: constant
  • time of the start of the season: earlier than average

The usual times of pollination can be found in our pollen calendars.

Tip of the season:
Not every person affected by grass pollen allergy reacts equally to every flowering grass during the season. The pollen calendars of the Pollenservice Vienna list the most allergologically important grass species and their pollination periods. This calendar is based on field observations and is specifically tailored to the Vienna region.

Pollen spectrum:
Pollen of the goosefoot family, scorpionweeds, cattail and linden occur as well.

Current main allergen: Grasses

Grass pollen allergy is the most prevalent pollen allergy in Vienna!
Pollination time in Vienna:
April to September; decorative grasses extend the pollination time into autumn!

Occurrence in Vienna: The sweet grass family (Poaceae) is prevalent and found nearly everywhere. Natural monuments, parks, the banks of the Danube and obviously all areas (meadows/lawns), that are mowed infrequently, are hot spots.

Who are “the grasses“?
There are many genera and species of relevance for persons concerned, especially because reactions to different taxa of the family are individual. Those grasses, that are of highest relevance for a grass pollen allergy, are mentioned in the following.
Bluegrass (Poa pratensis): flowers from April to June. It is sowed frequently for lawns and pastures.
Orchard grass (Dactylis glomerata): flowers from May to June. It occurs frequently (especially on meadows, roadsides, ruderal areas).
Falseoat-grass (Arrhenatherum elatius): flowers from May to July. Falseoat-grass prefers pastures and clearings.
Fescue grass (Festuca sp.): flowers from May to July. This genus is species-rich and prefers marshes like fine lawns, but also alluvial forests and roadsides.
Perennial rye grass (Lolium perenne): flowers from June to July. Perennial rye grass grows frequently on meadows and pastures and is used as pasture grass.
Timothy grass (Phleum pratense): flowers from June to September. Timothy grass is an allergologically famous gras but plays a minor role in Vienna due to its infrequent distribution. It prefers natural areas.
Bermuda grass (Cynodon dactylon): flowers from July to August. Bermuda grass is a neophyte in Europa and a light and heat indicator.
Cereals (cultivated rye, wheat and maize): Cereals belong as well to the sweet grass family. Grain fields in vicinity of Vienna may cause locally increased pollination, although cereal pollen is in general larger and thus not transported as far. Cultivated rye flowers usually from May to June, wheat from June to July and maize from July to August.

Cross-reactivity to pollen of other plants: Grass pollen is highly cross-reactive among pollen of other grasses

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

Video Highlight: Final phase of the main grass pollination period 2024 starts

Play
Ryegrass is typically found in meadows and on waysides and is currently in its main pollination period (Video on 07th of June 2024; location: 1220 Vienna; ©Karen Kölzer (MedUni Vienna/Pollenservice Vienna)).

Here you can see ryegrass growing in front of the Austrian Agency for Health and Food Safety (AGES), in the north of Vienna.