DIY GUIDE · GARDEN & OUTDOOR · CHECKED OCTOBER 2026
How to trim a hedge yourself
A morning for a typical garden hedge. £80–£190 in kit you keep.
Timing, the nesting-bird law, the order of cuts, and where a ground-level trim stops.
- Every step, start to finish
- Checked October 2026 — sources at the end
- Honest about when to call a pro
FIRST, THE HONEST ANSWER
Do it yourself, or get a gardener?
Do it yourself if…
- You can reach the top of the hedge standing on the ground, or on a low, stable platform at most
- The hedge is in your own garden and you have checked it for active nests
- It is a trim of this season's growth, not a hard cut back into old wood
- The face you are cutting is on your side, or your neighbour has agreed to you working from theirs
Get a pro if…
- The top is above head height and the only way up is a ladder leaning into the hedge
- The hedge runs along a road or pavement where cuttings and the trimmer reach traffic or people
- It needs reducing by a metre or more, or cutting back hard into thick, woody stems
- There is an overhead power line, a phone line or a glasshouse within reach of the blade
Safety first
- Use an RCD with any mains-powered trimmer outdoors; HSE advises a device rated at no more than 30 mA, and you test it with its own button before you start.
- Keep the cable over your shoulder and behind you, and look for it before every sweep; cutting through the lead is the classic garden electrical accident.
- Wear eye protection, gloves and ear defenders; some hedges, thuja and yew in particular, irritate the skin, so cover your arms.
- Hold a powered trimmer with both hands on the handles and keep the blade below chest height; never reach above your shoulders with it.
- Do not use a leaning ladder for hedge work. HSE says never to work off the top three rungs and to keep three points of contact, which a two-handed trimmer makes impossible.
- Stop the motor, and take the battery out or unplug it, before you clear a jam or touch the blades.
Stop here: Anything above head height, over the boundary, or holding an active nest
In England, Wales and Scotland it is an offence under section 1 of the Wildlife and Countryside Act 1981 to intentionally take, damage or destroy the nest of a wild bird while it is being built or used; in Northern Ireland the same protection is in article 4 of the Wildlife (Northern Ireland) Order 1985. Work at the top of a tall hedge from a ladder is work at height, which HSE treats as a planned job with the right access. Disputes about a tall evergreen hedge have their own law in each nation: Part 8 of the Anti-social Behaviour Act 2003 in England and Wales, the High Hedges (Scotland) Act 2013, and the High Hedges Act (Northern Ireland) 2011. How to hire a hedge cutter →
| MATERIAL | COVERAGE | FOR THIS JOB |
|---|---|---|
| Garden waste sacks | Reusable heavy-duty bags | Two or three for a typical garden hedge |
| Blade cleaner or light oil | For sap and resin on the teeth | A wipe after every use |
| Spare battery (cordless) | Matched to your trimmer | Only if one charge will not finish the length |
How long the trim will take
Faces to cut = the two sides plus the top, so the face length is about 3 × the hedge length. Trim the first 2 m and time it, then multiply. If 2 m of face takes 6 minutes, a 10 m hedge is 30 m of face, so about 90 minutes of cutting, plus about the same again for clearing up.
Measure your own pace on your own hedge; dense box takes far longer per metre than loose privet, and the clearing up always takes longer than people expect.
A corded trimmer is light and cheap and never runs flat, but the lead is the hazard. A cordless one removes the lead and suits most gardens; check the battery covers your length of hedge, or buy a second. Petrol is for long rural hedges and is heavier and louder than a garden needs.
A longer blade covers a wide face faster but is heavier to hold level at the top. The gap between teeth decides the thickest stem it will take cleanly; anything fatter than the gap is a job for loppers, not for forcing the trimmer.
Hand shears give the cleanest finish on small-leaved hedges and box, and are the right tool for shaping and for finishing corners. They are also quiet, which matters on a Sunday morning.
A pole trimmer lets you cut a top a little above your head from the ground. It is heavy at the far end, and your arms tire fast; use it in short bursts, and treat it as a reason not to need a ladder rather than a reason to tackle a tall hedge alone.
The manufacturer's own guidance is plain: a chainsaw lacks the safety features and the control for shaping a hedge. Thick stems inside a hedge are cut with a pruning saw or loppers, one at a time.
THE PART THAT DECIDES THE FINISH
Before you cut — by the hedge you have
The same trimmer does very different jobs on different hedges. Find yours, and do the checks before the motor goes on.
A young hedge in its first few years
Planted recently and still filling out.
- Leave the main upright stems alone until the hedge reaches the height you want
- For deciduous hedging such as beech, hornbeam or field maple, shorten the shoot tips by up to a third early in the year to make it branch
- Leave conifers such as thuja, cypress and yew untrimmed for their first year, then trim only the sides
- Expect to trim little and often; a young hedge is shaped in its first three years and lives with the result
An established formal hedge
Privet, beech, box, hornbeam or similar, already in shape.
- Walk the length and look inside for nests, especially between March and August
- Pick a cool, overcast day; strong sun scorches the inner leaves you are about to expose
- Set up a taut string line along the length at the finished height
- Plan two trims a year for fast growers such as privet and hornbeam, and one for yew, laurel and thuja
A conifer hedge
Leyland cypress, thuja or similar evergreens.
- Never cut back into brown, leafless wood; most conifers do not regrow from it and the gap is permanent
- Trim only the green growth, little and often, from spring to late summer
- Avoid cutting after the end of September, when new shoots cannot harden before frost
- Wear gloves and long sleeves; thuja sap irritates many people's skin
A flowering or informal hedge
Forsythia, escallonia, viburnum and the like.
- Wait until flowering has finished, or you cut off next year's display
- Shape loosely with shears or a trimmer rather than squaring it
- Remove a few of the oldest stems at the base with loppers if it is getting woody
- Check carefully for nests, since these dense shrubs are favourite nesting sites
A hedge on the boundary
Your neighbour's side, a road, or a shared line.
- You may trim growth that overhangs your side to the boundary, but agree it with the owner first
- Do not cut the far face from their garden without permission
- Next to a road or path, put out a sign or a second person, and never let cuttings land on the carriageway
- If the hedge is a line of evergreens over two metres high, the high-hedge rules for your nation may apply; see the Stop here card
THE JOB
How to trim a hedge, in order
Check for nests and plan the day
15 minStart with the checks in the section above for your type of hedge. Walk the full length slowly and look into the hedge from both ends and the middle, watching for birds flying in and out. If you find a nest that is being built or used, leave that section entirely until the young have gone. Decide which faces you can reach from the ground and which you cannot, and accept the second list now rather than at the top of a stretch.
- Watch the hedge for ten minutes with a cup of tea before you start; birds give away a nest by their comings and goings
- Spring and summer are the main nesting months, but nests can be active outside them too
- Note any wire, old fence posts or tree ties hidden inside the hedge
Mistake to avoid: Starting the trimmer and checking as you go. By the time you see the nest, the blade has been through it.
Set up the line, the sheet and the power
15 minPush a cane into the ground at each end and run a string tight between them at the finished height of the top. Lay a sheet along the base. For a corded trimmer, plug into an RCD-protected socket, press the test button, then run the lead over your shoulder and back towards the socket so it trails behind you.
- Tie the string to the canes with a slip knot so you can lower it if you change your mind
- Start at the end nearest the socket and work away from it, so the lead is always behind you
- Charge every battery the night before
Mistake to avoid: Leaving the lead coiled on the ground in front of you. The first downward sweep lands on it.
Cut out thick stems first
15 minBefore the trimmer, go along with loppers or a pruning saw and cut any stem thicker than the trimmer's tooth gap back into the hedge, a little below the finished face. This stops the blade jamming and bouncing, and it means the trimmer only ever meets soft growth. Cut back to a side shoot or a bud rather than leaving a bare stump.
- Reach in and cut the stem a hand's width inside the face so the cut is hidden
- Wear your glasses for this too; a lopped stem springs back
- Put these thicker cuttings on a separate pile; they shred or bag differently
Mistake to avoid: Forcing the trimmer through a stem it cannot take. It stalls, kicks, and leaves a ragged split that dies back.
Trim the sides, bottom to top
45 minHold the trimmer with both hands, blade flat against the face, and work in smooth upward arcs, letting the cut growth fall away from you. Move along a step at a time. Keep the face very slightly tapered so the hedge is wider at the base than the top; this lets light reach the lower branches, which is what keeps a hedge green to the ground.
- Take a little at first; you can always come back for more, but not the other way round
- Step back every couple of metres and look along the face from one end
- Cut new growth back by up to two thirds, but stop short of old, bare wood
Mistake to avoid: Cutting the sides vertical or wider at the top. The base falls into permanent shade and goes bare within a couple of seasons.
Trim the top to the string
30 minWith the sides done, cut the top using the string as your guide. Tilt the blade very slightly so it sweeps cut growth off the far side, and work in long, level passes. Keep the blade at or below chest height; if you cannot reach the middle of the top without stretching, stop at what you can reach and leave the centre.
- Look along the string, not at the blade, to keep the line
- A slight tilt to the outside throws clippings off the hedge rather than into it
- Go round the string with care; snagging it pulls the canes over
Mistake to avoid: Reaching up above your shoulders to finish the middle of a wide top. That is the moment a trimmer slips and the blade comes towards you.
Finish corners, ends and shapes with shears
20 minUse hand shears for the end faces, corners and any curves. Hold one blade still against the line and move the other, rather than chopping with both, and you will get a crisp edge. Shears are also the right tool for small-leaved hedges such as box, where a trimmer bruises the leaves.
- Keep the shear blades flat to the face, not angled into it
- Work in short, overlapping snips for a smooth finish
- Wipe sap off the blades every few minutes on a resinous hedge
Mistake to avoid: Squaring off the corners with the trimmer at the end of the day. Tired arms and a heavy tool give rounded, gouged corners.
Shake out and rake up
30 minRun a rake or a gloved hand lightly over the top to dislodge clippings caught in the hedge, then gather the sheet and tip it into sacks. Rake or vacuum any that missed the sheet. Clippings left on a lawn block light and cause bare patches; left on paths they are slippery.
- Fold the sheet from the edges inward so nothing spills
- Shredded clippings from deciduous hedges make good compost; conifer clippings break down slowly
- Clear the base of the hedge too; damp clippings there rot and attract slugs
Mistake to avoid: Leaving the clippings in the hedge top. They brown, look like dieback, and smother the new shoots underneath.
Look again from a distance
10 minWalk to the far side of the garden and look at the hedge as a whole. Uneven tops, a bulge on one face or a low spot show up far better from ten metres than from one. Make small corrections with shears rather than another pass with the trimmer.
- Look in the low evening light too; it shows dips the midday sun hides
- Correct a low spot by letting the rest catch up next time, not by cutting everything down to it
- Note anything you could not reach so it is on next time's list
Mistake to avoid: Chasing a perfect line with the trimmer. Every correction takes a little more off until the hedge is a foot lower than you meant.
Clean and store the trimmer
15 minRemove the battery or unplug, then brush clippings off the blades and housing. Wipe the teeth with a cloth and a little resin cleaner or light oil, which stops sap setting like glue. Check the blades for chips and the lead for nicks before you put it away.
- Fit the blade guard before you carry or hang it
- A nicked lead is replaced, not taped
- Store batteries indoors, away from frost
Mistake to avoid: Putting the trimmer away sticky. Next time the blades drag, overheat and tear the leaves.
The mistakes that show on a hedge
- Cutting into old, bare wood on a conifer and leaving a hole that never fills
- Letting the top get wider than the base, so the bottom goes bare
- Trimming in hot sun and scorching the inner leaves
- Cutting through a nest that a ten-minute watch would have found
Stop here and get a hedge cutter
- The top is out of reach from the ground and the only way up is a ladder; a two-handed trimmer and three points of contact cannot happen at the same time
- The hedge needs a hard reduction or a big cut back into old wood, which is a different job from a trim
- It runs beside a road, a power line or a neighbour's glasshouse
- There is an active nest and the hedge must be cut now for a safety reason
| WHAT YOU SEE | WHY, AND THE FIX |
|---|---|
| Hedge turning brown after trimming | Usually cut too far into a conifer, or trimmed in hot sun. Brown tips from scorching recover; brown patches on cut-back conifer wood do not, so let the neighbouring growth cover them. |
| Hedge bare at the bottom | The top is wider than the base and shading it. Trim the sides to a gentle taper over the next two trims and the lower branches will green up on most deciduous hedges. |
| Ragged, torn leaf edges | A blunt or sap-clogged blade. Clean the teeth, then sharpen or replace the blade; tearing also lets disease in. |
| Top not level | Cut by eye. Set a string line next time and correct small high spots with shears rather than another pass. |
| Gaps or holes in the hedge | Lack of light, or old wood cut back. Clear anything shading the gap; tie a nearby shoot to a cane across it and it will grow in. |
| Trimmer keeps stalling | Stems thicker than the tooth gap, or a flat battery. Cut thick stems with loppers first; swap the battery before it dies mid-sweep. |
| RCD keeps tripping | A damaged lead, wet connection or a fault in the trimmer. Stop using it, check the lead along its length, and have the tool repaired rather than bypassing the RCD. |
| Yellow, sickly patches after the cut | Often dryness or a nutrient shortage showing once the outer layer is gone. Water deeply in a dry spell and mulch the base; persistent patches on box or privet may be disease. |
WHAT YOU SAVE
What it costs to do it yourself
| Hedge trimmer, corded or cordless | £49–£149 |
|---|---|
| Hand hedge shears | £16–£21 |
| Safety glasses and ear defenders | £9–£10 |
| Gardening gloves | £2–£5 |
| Garden waste sacks | £3–£4 |
| Total, first time | £79–£189 |
| DIY total | £80–£190 |
Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.
Almost all of it is kit you keep, so every trim after the first costs only your time. Against a hedge cutter's hourly rate, a twice-yearly trim pays for the trimmer in the first year for most garden hedges.
RATHER NOT?
Hedge cutters near you, with prices shown
The ones who cover your area, nearest first, with one score from every review. No account needed to look.
Or post the job free and let them come to you.
In a dry spell, water deeply at the base after a heavy trim and spread mulch along the roots; a freshly cut hedge loses moisture faster.
Compost soft deciduous clippings, shred thicker material, and put the rest in your council's garden waste collection or take it to the household waste recycling centre. Never tip it on verges or in woodland; that is fly-tipping.
Clean the blades, check the lead, and store batteries indoors; a blade that is sharpened once a season cuts far better than one left until it tears.
Twice a year for privet, hornbeam and beech; once for yew, laurel and thuja. Fast growers in a wet summer may want a light tidy in between.
Trimming a hedge: questions people ask
Cutting a hedge is not illegal in itself, but intentionally damaging or destroying a wild bird's nest while it is in use or being built is an offence in every UK nation. Check before you cut, and leave any section with an active nest until the young have left.
Fast-growing hedges such as privet, beech and hornbeam want two trims a year; yew, laurel and thuja are usually fine with one. Light, regular trims make a denser hedge than one heavy cut.
Not into the brown wood. Most conifers will not regrow from bare wood, so a hard cut leaves a permanent gap. Yew is the exception and tolerates hard pruning.
You can usually cut back growth that overhangs your side to the boundary line, but agree it with your neighbour first and offer them the cuttings. Do not go onto their land or cut the far face without permission.
Not a leaning ladder against the hedge. HSE guidance is to keep three points of contact and never work from the top three rungs, which you cannot do with a two-handed trimmer. Use a long-reach trimmer from the ground, or have it done.
The Locufy UK price guide puts hedge cutting at £20–£50 per hour, typically £30. Waste removal is often extra, so ask whether the price includes taking the clippings away.
MORE GUIDES
More DIY guides
Sources — checked October 2026
- HSE — safe use of ladders and stepladders: three points of contact, not the top three rungs
- HSE — electrical safety FAQs: RCDs outdoors, rated at no more than 30 mA
- STIHL — trimming hedges: timing, two-thirds rule, tapered shape, nesting birds
- STIHL — hedge trimmer tips: cleaning, maintenance and sharpening
- Wildlife and Countryside Act 1981, section 1 — wild birds, their nests and eggs
- Wildlife (Northern Ireland) Order 1985, article 4
- Anti-social Behaviour Act 2003, section 66 — high hedges (England and Wales)
- High Hedges (Scotland) Act 2013, section 1
- High Hedges Act (Northern Ireland) 2011, section 1
- GOV.UK — dispose of garden waste
- Wickes — price check: hedge trimmers
- Wickes — price check: hedge shears
- Wickes — price check: safety glasses
- Wickes — price check: ear defenders
- Wickes — price check: gardening gloves
- Wickes — price check: garden waste sacks