Pollen count for the region Hertford
oak
nettle
grasses
birch
plantain
rumex
ash
mugwort
hazel
elm
yew
willow
poplar
alder
oak
nettle
grasses
birch
plantain
rumex
ash
mugwort
hazel
elm
yew
willow
poplar
alder
oak
nettle
grasses
birch
plantain
rumex
ash
mugwort
hazel
elm
yew
willow
poplar
alder
oak
nettle
grasses
birch
plantain
rumex
ash
mugwort
hazel
elm
yew
willow
poplar
alder
oak
nettle
grasses
birch
rumex
plantain
ash
mugwort
hazel
elm
yew
willow
poplar
alder
oak
nettle
grasses
birch
rumex
plantain
mugwort
hazel
elm
yew
willow
poplar
ash
alder
oak
nettle
grasses
plantain
birch
rumex
mugwort
hazel
elm
yew
willow
poplar
ash
alder
