One of the questions we get most often is: when is the best time to have tree surgery done? The honest answer is that it depends — on the species, the type of work, and whether there are legal or ecological constraints to consider. Here is a straightforward guide.
Dormant season pruning: late autumn to late winter
For most deciduous trees, late autumn through to late winter — roughly November to February — is the ideal window for pruning and crown reduction. Trees are dormant, the risk of transmitting certain fungal diseases is lower, and without leaves you can see the branch structure clearly. The tree will also respond well to correctly-made pruning cuts, sealing wounds efficiently as growth begins in spring.
Nesting season: March to August
The nesting season for most UK birds runs from March to August, and during this period you should check for active nests before carrying out any tree work. It is not illegal to carry out tree surgery during nesting season — but it is illegal under the Wildlife and Countryside Act 1981 to damage or destroy the nest of any wild bird while it is in use or being built. We check for nests before any work begins from March to August and adjust timing accordingly if an active nest is found.
Species-specific timing
Some species have specific timing requirements. Oaks should not be pruned from April to June to avoid the risk of oak processionary moth and oak wilt. Cherries, plums, and other Prunus species are best pruned in late summer (July-August) rather than winter to reduce the risk of silver leaf disease. Elms are best left until winter to reduce beetle activity. Horse chestnuts are similarly best pruned in winter to reduce the risk of bleeding canker spread. When we assess a tree, species-specific timing advice is part of what we give you.
Emergency and safety work has no season
A tree that poses an immediate risk to people or property can and should be made safe immediately, regardless of time of year. Emergency storm response, removal of structurally compromised trees, and make-safe operations are carried out year-round. If a tree is dangerous, waiting for the dormant season is not an option.
The bottom line
If you are thinking about tree surgery but are not sure whether the timing is right, call us. A free site visit costs you nothing, and we will tell you the best approach for your specific trees — including the right time of year and whether any planning constraints apply.