What "Crown Thinning" actually means.
Crown thinning opens the canopy from the inside out, removing a measured percentage of secondary branches evenly throughout the crown. The tree keeps its size and outline, but light and wind move through it more freely — and the load on major limbs reduces. Done well, it's almost invisible from the kerb; done badly, it leaves the tree looking thin and stressed. We follow BS 3998 to the letter.
What's involved on the day
- Climbing inspection to identify weak, crossing and crowded branches
- Selective removal of 10–20% of secondary growth, evenly across the canopy
- Retaining the tree's natural form and outline
- Cuts made cleanly at branch collars so the tree can compartmentalise
When you might need it
- Garden or rooms beyond the tree are darker than they should be
- Mature tree is catching too much wind in exposed positions
- You want to keep the tree at its full size without it dominating the space
- Routine maintenance pruning every 3–5 years on a valued specimen