Peak
Release period
Hazel
Yew
Alder
Elm
Willow
Poplar
Birch
Ash
Plane
Oak
Pine
Lime
Grass
Dock
Mugwort
Nettle
Oilseed rape
Plantain
S
A
J
J
M
A
M
F
J
Sep
Aug
Jul
Jun
May
Apr
Mar
Feb
Peak
Release period
Jan
Hazel
Yew
Alder
Elm
Willow
Poplar
Birch
Ash
Plane
Oak
Pine
Lime
Grass
Dock
Mugwort
Nettle
Oilseed rape
Plantain
Pollen type