How to thin out a tree
We show you how to prune a congested tree to improve its health and form.
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Crown thinning involves pruning out a small number of larger branches in the crown of a tree to allow light to filter into the canopy.
It's also a good idea to remove up to a quarter of the thinner branches from the crown on a regular basis to allow air to circulate through the tree, reducing problems with pests and diseases.
Carry out such pruning every three to six years – more frequently on younger trees. Secateurs can be used for thin, twiggy growth, while loppers and a pruning saw will be handy for anything thicker. Be sure to always cut back to a healthy bud or a strong shoot or branch.
Get pruning with these steps on how to thin out a tree.
You Will Need
- Secateurs
- Pruning saw
- Long-handled loppers, For taller branches
Step 1
Inspect the tree thoroughly, considering which branches, if any, you need to cut out. This tree is well-formed and only needs a little pruning. Identify any dead branches for removal first and cut these out.
Step 2
Use a pruning saw to cut out some of the thicker, congested branches, especially those that are growing in the centre of the crown of the tree. Prune back flush to a main branch, taking care not to leave any stubs.
Step 3
Cut back thin, twiggy stems to the main branches and trunk using secateurs. This will tidy up and clear the tree, allowing more light through to plants growing underneath.
Step 4
Reduce the length of strong, young, upright growths that would compete with the main leader. Cut back by between a third and a half their length, pruning to just above a bud with secateurs or loppers.
Step 5
Assess the finished shape of the tree, making a last check to remove any badly placed or crossing branches. Aim to leave an open crown with well-placed branches.
Other trees to prune like this
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