Ash
Fraxinus
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Wikimedia Commons / Willow
Botanical nameFraxinus
SeasonMar – May
Peak levelApr – Apr
Ash flowers at the same time as birch and is often underestimated. As a relative of the olive tree, it shows cross-reactions with olive pollen. Ash is common throughout Austria.
Pollen Season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Season (Mar – May) Peak level (Apr – Apr)
Typical Symptoms
- Hay fever
- Asthma
- Eye inflammation
Threshold Levels
- Level 0 of 5: None< 10 grains/m³
- Level 1 of 5: Low≥ 10 grains/m³
- Level 2 of 5: Moderate≥ 50 grains/m³
- Level 3 of 5: High≥ 80 grains/m³
- Level 4 of 5: Very High≥ 150 grains/m³
- Level 5 of 5: Extreme≥ 300 grains/m³
Thresholds based on European Aeroallergen Network (EAN) guidelines
Tips for Allergy Sufferers
1Ash pollen overlaps with birch — combined exposure is possible
2Watch for cross-reaction with olive pollen
3Use pollen filters in ventilation systems