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First flowering

Horse chestnut flowers are in clusters. Record first flowering when the petals of the first individual flower in the cluster are open sufficiently for you to see inside the flower.

Expected date range: mid April to mid May

Available historic data: we have very good data from 1891-1999 (8697 records) 

Just right

  • First flowering on a horse chestnut tree
    (Judith Garforth/WTML)

Too late

  • Flowering on a horse chestnut that is too late
    (Rosanna Ballentine/WTML)