What is the difference between tree pollen, grass pollen, and weed pollen?
Tree pollen, grass pollen, and weed pollen differ mainly in the plants that produce them and the times of year they are released in the UK. Tree pollen comes from various trees and peaks from late March to mid-May, grass pollen from grasses and is highest from mid-May to July, while weed pollen from weeds like nettles and ragweed runs from end of June to September. These seasons can shift slightly due to weather, but grass pollen affects the most people with allergies.
Key points:
- Tree pollen season starts earliest, mainly late March to mid-May from trees like birch, hazel, and ash.
- Grass pollen follows in mid-May to July and causes allergies in most people.
- Weed pollen peaks from late June to September from plants like nettles and ragweed.
- Pollen grains vary in size and travel distance, with weed pollen often smallest and furthest-travelling.
This text has been fact-checked for accuracy by medino's clinical team.