Pollen species

The plants behind your allergies

Pollen allergy is caused by a relatively small number of plant species. Understanding which ones are active in your region — and when — is the first step to managing symptoms.

Trees · 2

Birch

Betula spp.

Europe's most widespread tree allergen — and a trigger for food reactions in the majority of those with sensitivity.

📅March – May (peak late April to early May, Northern Hemisphere)

Very High allergenicity

Olive Tree

Olea europaea

The Mediterranean's most potent spring allergen — olive pollen peaks in May and affects millions across 66 countries.

📅Mid-April to late June (peak: last 10 days of May)

Very High allergenicity

This information is provided for general awareness only and is not a substitute for professional medical advice, diagnosis, or treatment. If you have concerns about pollen allergies or respiratory symptoms, consult a qualified healthcare provider.