Crown thinning Bournemouth, Poole & Dorset
Too much shade, but you love the tree as it is? Crown thinning takes out selected branches from inside the crown, so more light and wind pass through while the outline stays the same.
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- NPTC, City & Guilds & Lantra
- £5M insured
Crown thinning in short
Crown thinning is the removal of a proportion of the smaller branches from inside a tree's crown, evenly throughout, without changing its overall size or shape. It lets more dappled light through, reduces the weight on the main limbs and the wind resistance of the crown. It is specified as a percentage, usually 10% to 20%, and never more than the tree can safely lose.
- Typical thin
- 10% to 20% of the branches, evenly through the crown
- Good for
- Light, wind load and crossing or rubbing branches
- Not for
- Making a tree smaller. That is a crown reduction
- Standard
- All cuts to British Standard BS3998
- Permission
- Needed for TPO trees and in conservation areas
How crown thinning works
Done well, you can't see where the branches came from, only that the tree looks lighter.
Our climber works through the crown removing crossing and rubbing branches, weak or crowded shoots, and a share of the smaller branches spread evenly through the tree. The main structure is left intact.
We take care not to strip out the inside of the crown and leave leaves only at the tips, a fault sometimes called lion-tailing. That moves the weight to the ends of the branches and makes them more likely to fail.
Thinning suits broadleaf trees with dense crowns, such as sycamore, lime, oak and beech. For conifers and for trees that are simply too big, a reduction usually does more good.

Crown thinning questions
Anything not covered here? Ask us and we'll give you a straight answer.
How much of a crown can be thinned?
What is the difference between crown thinning and crown reduction?
Will thinning let more light into my garden?
How often does a tree need thinning?
Do I need permission to thin a tree?
Do we cover you?
Based in Ferndown, covering all of Dorset, all of Hampshire and parts of Wiltshire.
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- NPTC
- City & Guilds
- Lantra
- £5M insured
- BS3998
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