Pollen Count & Forecast for Hanover
About Pollen in Hanover
Hanover’s spring allergy season (March-May) is dominated by Birch and Alder pollen; Silver Birch (Betula pendula) prolific in the Eilenriede forest; Black Alder (Alnus glutinosa) widespread along the Leine river banks. English Oak (Quercus robur) contributes significantly from the Georgengarten and city parklands. Summer (May-August) sees high Grass (Poaceae) pollen levels, originating from the Maschsee meadows and Herrenhausen Gardens.
The flat North German Plain has consistent wind-borne pollen drift, leading to high city-wide concentrations. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from decomposing leaf litter in the Eilenriede and damp soil near the Ihme river.
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What Pollen Levels Mean
LOW
Symptoms are unlikely
MED
Moderate risk of symptoms
HIGH
Widespread symptoms likely
V.HI
Expect significant symptoms
X.HI
Extremely high symptom likelihood & severity