Beech hedging
Newly planted: There is no need to prune your new hedging plants if they have plenty of side branches. If plants are sparse, however, help thicken them up by shortening the leading shoot and longer shoots by up to one third. Do this in winter or straight after planting. Repeat in the second year if the plants still look a bit leggy.
From the third year onwards, trim the sides of the hedge in the second week of August. The top can be pruned when your beech hedge reaches the height you want to keep it at. If you aim for a width of about 1m (3¼ft) at the base and a flat-topped A-shape (in cross section), the hedge will be well-shaped with plenty of sunlight reaching the top and bottom.
Established hedge: Trim your beech hedge each August to keep it to the size you want. This late summer trimming allows the hedge to retain its recent flush of new leaves over the winter in a brown, autumnal state, providing year-round screening. If you miss pruning in August just trim the following spring instead (don’t disturb nesting birds though – see the Top Tip below).
Overgrown hedge: Don’t be afraid to cut back hard an overgrown beech hedge in February while it is still Dormancy refers to a period of inactivity in plants, during which they slow down or stop their growth, conserving energy and resources. This is a natural process that helps them survive harsh conditions, such as winter or drought. Dormancy in seeds is a mechanism that prevents them germinating until environmental conditions are favourable for growth.
dormant but wait a while if the weather is very cold. If you need to reduce the height or sides by half or more, it’s best to stagger pruning over two seasons rather than doing it all at once. Cut one side and the top in the first year, leaving the other side to the second year. If your hedge is slow to regrow after the first prune, postpone the second cut back for a further twelve months.
Beech trees
Allow your young specimen trees to keep their lower side branches until the crown has matured a little. This is to discourage the formation of more than one leading shoot (multiple leaders spoil the shape of the tree and can be prone to failure if allowed to mature) and to protect the main stem from sun scorch.
Prune a beech tree, if necessary, between autumn and early spring. It is usual to create a clear trunk of 2.4-3m (8-10ft) to allow the sweeping lower branches some space to develop. Cuts with a diameter larger than 6cm (2½in) may not heal so readily so try to keep these to a minimum. A professional tree surgeon will be able to advise on more major pruning work. Read more about things to consider when pruning trees on our advice page.