CHMI operates phenology network. There are observed also phenophases connected with pollen season (inflorescence emergence, beginning and end of flowerinf) according CHMI phenology methodology.
In the list of observed species are included also allergology important plants as are meadow foxtail, cocks foot, silver birch, common hazel, common alder etc.Temporal and spatial evaluation of phenophase onset can be useful for prediction of pollen in the air.