First leaf

Record silver birch 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 silver birch events before, continue to record on the same tree.

Expected Date Range: late March to early May 

Available historic data: we have individual records for the following years; 1753-1810, 1846-1865, and 1869-1947. We have some records from 1987-1999.