It is found in woods and hedges as well as by roads and streams. Elm is wind pollinated, usually flowering early in the spring and peak pollination occurs in March. Willows are small 3 to 15m shrubs or trees commonly found in wet environments such as riverbanks and lake shores.
They are closely related to aspens, cottonwoods and poplars. They are among the earliest flowering trees in the UK, with peak polination occuring in March. Poplar is a medium-sized deciduous tree, growing to heights of up to 16 to 27m. It is common in towns and cities where it is often used along boulevards or around squares. In the UK, poplar flowers in spring, with peak pollen production during March.
The common silver birch is a single-stemmed, deciduous tree up to about 25 metres tall, with distinctive silvery bark. Birch pollen is highly allergenic and is a significant cause of asthma and rhinoconjunctivitis. Pollination occurs from spring to early summer, peaking between April and May. The European ash is a broad, deciduous tree, growing up to 35 m in height.
Ash trees are wind pollinated, with pollen travelling up to metres from the tree. They spread large amounts of pollen during the flowering season, which in the UK is from March to May, with the peak occurring in April. The London plane tree is easily identified by its distinctive bark which peels in large flakes. It is commonly found in urban areas of the UK, planted along streets and in squares.
Over half of the trees found in central London are of this species. London plane is wind pollinated and pollination peaks during May. Oaks are large deciduous trees with broadly spreading canopies, found throughout the UK both in rural areas and in urban or suburban parkland.
Flowering generally occurs in spring but may vary based on local temperatures and weather conditions, with pollination peaking around May. Oilseed rape is a common food crop in the UK, grown principally for oil production. Oilseed rape fields are easily recognisable by the bright yellow flowers which are characteristic of this species. Are pollen counts higher in the morning or the evening?
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If you are interested in the science behind the pollen forecast, you may be interested in our science degrees. We also offer tours of our Pollen Labs as part of our Open Days. Pollen forecast. By David Hughes. The freshest exclusives and sharpest analysis, curated for your inbox Email address is invalid Thank you for subscribing! Sorry, there was a problem. Read More Why is hay fever so bad this year? More from News.
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