Cloned from a seedling raised on the William Caldwell nursery in Knutsford, Cheshire in the hot summer of 1976.This nursery is sadly no longer in business but its name lives on with this upright form that is proving popular as a self-maintaining urban tree where space is restricted.

Thriving in most free draining aspects, Acer campestre William Caldwell can colour up nicely in the autumn on acid soils with leaves turning orange and sometimes red. On alkaline soils the leaves are more likely to turn buttercup yellow in line with its Field Maple parents.

Mature height: 7-12m