| Summary: | This paper presents the course of the pollen season of selected allergenic taxa (Secale spp., Rumex spp., Plantago spp., Urtica spp., Artemisia spp., Chenopodiaceae and Poaceae) in Szczecin (2009) and Gudowo (Western Pomerania, Poland) (2009–2010), and also the flowering pattern of Chenopodium album, Artemisia vulgaris and Secale spp. Pollen deposition was studied by the gravimetric method using a Durham sampler. In 2010 the flowering period of the studied taxa was shorter than in 2009 and its onset was observed later; the maximum values of daily pollen deposition were lower. Pollen grains of most of the taxa studied appeared in the atmosphere of the city earlier than in the rural area, but in the rural area significantly higher values of daily deposition were recorded. The effect of weather conditions on pollen fall in Szczecin in 2009 was analysed. Statistically significant positive correlations with pollen deposition were found only with maximum, minimum, and mean air temperature, dew point and maximum wind speed, while a negative correlation was found with precipitation and – only for Rumex pollen grains – with air humidity and pressure.
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