Grass
High
Index value 4 of 5.
Grasses active.
Sunday 28 June Updated 04:22
Tomorrow stays at this level.
High
Index value 4 of 5.
Grasses active.
Very low
Index value 1 of 5.
Low
Index value 2 of 5.
BD covers part of Yorkshire and the Humber and follows its regional pollen pattern closely.
Tree pollen here is dominated by silver birch, oak and ash, with grass led by ryegrass and cocksfoot and weeds by nettle and plantain.
Tree pollen typically peaks in April. Grass counts are highest from June. Birch is a notable trigger here in April; grass takes over by mid-June.
For the wider regional view see Yorkshire and the Humber.