Pollen is an important source of allergens in the natural environment, and the cause of the appearance of symptoms of allergic disease in hypersensitive individuals. In our laboratory, we monitor 60 types of pollen of various allergenic potential, and publish the results of measurements from different phytogeographical areas in Slovenia. Data on daily concentrations, together with many years of experience, are the basis for making short-term forecasts about pollen air pollution.

Pollen calendar in Slovenian language is available here.

Pollen forecast

Forecast from May 21 to May 28, 2025

Rainfall will reduce the pollen concentration in the air, an increase is expected again on Saturday and in the following days.

In the lowlands, the main grass pollen season is underway, in dry weather pollen levels will be high. Low-allergenic plantain and sorrel are also blooming, the loads will generally be low, but may be elevated locally. Pollen from elder, privet, and conifers (mainly pine) will also be in the air, along with the last grains of South European flowering ash and oak.

In the coastal region, the grass pollen loads will be high in dry weather, with pollen from plantain and sorrel also present in smaller quantities. The main olive pollen season is in progress, with locally high concentrations, while the South European flowering ash season is coming to an end. Holm oak is blooming, a native species of oak, which is often used for urban greening in the coastal region. Pollen from nettle, pellitory, elder, privet, and pine will also be present.

Write to pelodinfo@nlzoh.si for more information.