Crown reduction is a reduction in height and/or spread of the crown (the foliage bearing portions) of a tree. Crown reduction may be used to relieve stress on individual branches or the whole tree, make the tree more suited to its immediate environment, or to reduce the effects of shading and light loss on nearby properties. The final result should retain the main framework of the crown, although with a smaller outline, and where possible be symmetrical. Reductions may be specified by actual measurements, and reflect the finished result, but may also refer to lengths of parts to be removed to aid clarity, e.g. ‘crown reduce in height by 2.0m and lateral spread by 1.0m, all round, to finished crown dimensions of 18m in height by 11m in spread (all measurements approximate.)’. Not all species are suitable for this treatment and crown reduction should not be confused with ‘topping’, an indiscriminate and harmful treatment.