England Pollen Density by Type
Grass Pollen
Weed Pollen
Tree Pollen
Grass Pollen
Grass pollen is less common in the south than other places in the UK, which means hay fever effects should lessen by the middle of summer. There is a higher percentage of grass cover in the northern and western regions of Great Britain.
High mountainous regions in Scotland show lower levels of grass cover than their surrounding lower lying areas.
The eastern central area of England has the lowest percentage grass coverage, while Wales and north west England, and western Scotland have the highest density of grass coverage.
Weed Pollen
Weed pollen, which releases its pollen around September, has an even spread across the UK. Dock weed and nettle seem to grow where the other doesn't, accounting for this even spread. Nettles, however, are abundant in urban areas, especially in the South.
Plantain is relatively evenly distributed across the whole of Great Britain, with the highest areas of coverage in urban areas.
Mugwort has much lower general levels of coverage, reaching a maximum of only 0.1%. Mugwort has a similar distribution to nettle, being found mostly in the south and eastern areas of Great Britain, and in urban areas.
Tree Pollen
Of the broadleaf trees, alder and willow have the lowest number of trees, followed by oak and ash. Birch and hazel both have higher abundance in terms of number of trees. The distributions of oak and ash are very similar to each other making up the rest of the country.
In England, pine is the main conifer and it is very abundant. However, there is a notable absence of pines in London, Wales and the west of England.
Tree pollen is particularly prolific in the South East. Hazel and birch pollen are higher here than anywhere else in the UK. Trees pollinate between late March and mid-May.