birch

Ash calendars

Tree calendar

This calendar shows when specific trees are flowering (in the Netherlands). The calendar is video-based. Every tree is explained by a short video. Corylus aveilana   Alnus incana   Alnus glutinosa   Salix viminalis   Taxus Bacatta   Populus x more   Carpinus Betulus   Betula pendula more information >> Fagus sylvatica   Quercus robur […]

allergenic pollencounting

Birch

The Birch is not the first trees in the season which flowers, but it has highly allergenic pollen. Although there is a flowering-calendar which indicates the usual period of flowering, you can see in the graph this can vary a lot. In 2017 there was a birchpollen peak (in the Netherlands) at the end of […]