New: patient’s hayfever diary
Journalize your personal hayfever diary about your allergic complaints and compare with the concentrations of pollen in the air. You will learn more about the preventive measures you have taken and their effort. You can enroll anonymous or with your name at http://phd.polleninfo.org
Pollen forecast for the Netherlands
Below you can find the forecast for the presence of the most common pollen types in the air. The table presents in which period the pollen most likely will occur (Period) and when the highest pollen counts (Peak) in the air can be expected.
Pollentype Period Peak
Corylus hazel mid Jan-end Feb begin Feb
Alnus alder mid Jan-begin Apr mid Feb
Fraxinus ash mid Mar-mid May mid Apr
Betula birch begin Apr–begin May mid Apr
Poaceae grasses mid May-end Aug begin Jun-mid July
Rumex sorrel mid May-mid Jul begin Jun
Plantago plantain mid May-end Aug begin Jun
Chenopodiaceae lamb's quarter mid Jul-end Aug begin Aug
Artemisia mugwort mid Jul-end Aug mid Aug
