Grass
Moderate
Index value 3 of 5.
Grass active.
Sunday 28 June Updated 04:27
Tomorrow climbs higher.
Moderate
Index value 3 of 5.
Grass active.
None
Index value 0 of 5.
Moderate
Index value 3 of 5.
Mugwort active.
Hayfever sufferers in London should track all three pollen types from March through August.
Tree pollen here is dominated by London plane, oak and lime, with grass led by ryegrass and cocksfoot and weeds by nettle and mugwort.
Tree pollen typically peaks in late March to early May. Grass counts are highest from late May into early July. Mature urban canopy with high plane and lime cover keeps the tree count active well into May.
For the wider regional view see Greater London.