Pollen is very low in Belfast today.

Hayfever sufferers in Belfast should track all three pollen types from March through August.

Tree pollen here is dominated by birch, alder and oak, with grass led by ryegrass and cocksfoot and weeds by nettle.

Tree pollen typically peaks in April. Grass counts are highest from June. Birch and alder are the headline tree triggers; the grass season is shorter than in southern England.

For the wider regional view see Northern Ireland.