Pollen from alder trees has begun to circulate in southern Finland, as reported by the University of Turku. In the upcoming days, additional pollen from alder and hazel trees is expected to spread throughout the southern and central parts of the country. Currently, the pollen levels are quite low, but the flowering of these plants is projected to start in about two weeks, raising concerns for allergy sufferers.

Alder trees are found almost throughout the country, whereas hazel is mainly located in the southern and southwestern regions. Both types of pollen are known allergens, and cross-reactivity with birch pollen is common among those who suffer from allergies. Following the alder and hazel, birch will be the next to bloom, with its pollen season typically starting around mid-April as pollen is carried from Central Europe to Finland. Approximately one-fifth of the population is allergic to pollen, which could lead to increased discomfort as the season progresses.

The University of Turku will provide updates on the pollen situation starting Monday, with information available three times a week through their Norkko service, which aims to keep allergy sufferers informed about the ongoing levels of pollen and potential triggers, an essential service for many as they prepare for the upcoming flowering season.