The Gardener's LogHedge Trimming and Bird Nesting Season: What the Law Says and When to Cut
Hedges are among the most common jobs in any garden and also among the most misunderstood, especially where the law and wildlife are concerned. Autumn and winter are generally the best time for a major hedge cut, but there are some rules and some good habits worth knowing about.
This post gives the general position for England. Rules can differ in Scotland, Wales and Northern Ireland and can change, so check official guidance if you are unsure.
What the law says about birds
In the UK, it is an offence under the Wildlife and Countryside Act 1981 to intentionally kill, injure or take a wild bird, or to intentionally damage or destroy a nest while it is in use or being built. The law does not set an exact calendar window for hedge cutting. The commonly quoted guidance is to avoid cutting hedges from about March to August, as this is when most birds nest, but some birds nest earlier or later than that, and a nest in use is protected whenever it is found.
In practice that means:
- Late autumn to late winter is the safest time to do a heavy cut.
- Between spring and late summer, only trim if you have checked carefully and found no active nests, and ideally delay the job.
- If you find an active nest at any time, stop work in that section and leave it alone until the young have fled.
Wood pigeons, blackbirds, wrens, and robins can all nest in the same hedge, sometimes in unexpected months. A thorough check before you start is always sensible, and I generally check even in October and November.
There are additional rules for farmers and land managers, who may be subject to scheme conditions about hedge cutting, so landowners should check current government guidance.
Why autumn is a good time
By October most of the nesting is over, and birds can also benefit from berries and seeds in a hedge over winter. That second point is worth thinking about: a hedge that is cut too early in autumn removes berries from hawthorn, blackthorn and holly that birds rely on. If you have a mixed native hedge with berries, wait until the berries have been eaten, often towards January or February, then cut.
For formal evergreen hedges like privet, yew, laurel and leylandii, an autumn trim may be the last tidy before winter. Cutting too late in the season can mean frost damage to fresh cuts on tender species, which is more of a risk in cold areas.
How to cut a hedge properly
- Shape: Keep the hedge slightly wider at the base than the top, a gentle A-shape. This lets light reach the lower branches and helps stop it going bare at the bottom and snow settling on top.
- Level: Use a string line between canes for long straight hedges to keep the top level. Work from the bottom up, then across the top.
- Little and often: Cutting a little each year keeps a hedge dense. Conifers, especially leylandii, generally do not regrow from old bare wood, so never cut back into brown wood unless you are sure. Take only the green growth.
- Broadleaf hedges like hornbeam, beech, hawthorn and privet can usually be cut back harder, and often regrow from old wood, but take advice before a drastic cut.
- Clean cut: Sharp blades make cleaner cuts and heal better. See our post on preparing garden tools for winter for sharpening and cleaning.
Safety
Hedge trimming involves sharp blades and often ladders. A few basic rules:
- Wear eye protection, gloves and sturdy footwear.
- Use a stable platform, not a wobbly step ladder. For tall hedges, a properly set-up platform or a professional is safer.
- Keep cables well away from the blades if using an electric trimmer, and use a residual current device (RCD).
- Do not work on wet ground in poor light or in strong wind.
- Never carry a running trimmer, or hold it above shoulder height for long, as fatigue causes accidents.
When a hedge becomes a legal issue
If a hedge is allowed to grow very tall, it can become a problem for neighbours. In England and Wales, Part 8 of the Anti-social Behaviour Act 2003 allows a neighbour to complain to the local council about a high hedge, which generally means an evergreen or semi-evergreen hedge of more than two metres in height that blocks light or is a nuisance. The council can require action, and the owner has a duty to follow it. Talking to your neighbours first is almost always quicker and cheaper.
You are also responsible for stopping a hedge from growing over a public footpath or highway, causing an obstruction. Your local council can require you to cut it back.
Cutting a hedge on a boundary
A hedge on the boundary may belong to one neighbour or be shared. Do not assume ownership based on which side of a fence the hedge is on. You can trim branches that overhang from the neighbour's side, but they remain the neighbour's property, so offer to return the clippings. You should not cut or remove a boundary hedge without agreement.
Disposing of the clippings
Clippings can be shredded and added to the compost heap in moderation, mixed with other material, as explained in our composting guide. Laurel and conifer clippings break down slowly, so shred them first. Many councils run garden waste collections, and some take hedge trimmings, but check any limits.
The short version
- Check carefully for nests at any time of year.
- Heavy cuts are best done between late autumn and late winter.
- Leave berrying hedges until the berries have gone.
- Do not cut into old brown wood on conifers.
- Be considerate of neighbours, and keep tall evergreens under control.
Thinking of planting a new hedge? Read our guide to planting bare-root hedging, which starts to become available at this time of year.