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First leaf

Record first leaf when the leaf is fully open and recognisably the shape, if not the full size of the adult leaf. 

If you have recorded oak (pedunculate) events before, please continue to record on the same tree.

Expected date range: early April to mid May

Available historic data: we have individual records from 1753-1810, and 1828-1937. We have good records from 1938-1947, and from 1967-1999. 

Just right

  • Leaf forming on an pedunculate oak
    (Kylie Harrison Mellor/WTML)

Too early

  • Leaf forming on a pedunculate oak too early
    (Kylie Harrison Mellor/WTML)

Too late

  • Leaf on an pedunculate oak too late
    (Judith Garforth/WTML)