At least once a year, and unlike most hedges this is closer to a rule than a recommendation. With Leylandii, how often you cut decides what you are still able to do later.
Why it is different from other hedges
For a beech or privet hedge, skipping a year is cosmetic. You get a shaggier hedge and a slightly heavier cut next time, and nothing is lost — those species regrow from old wood, so the hedge can always be brought back.
That is what you are actually buying with an annual cut. Not tidiness — the continued ability to make the hedge smaller.
The growth rate
Leylandii puts on comfortably two to three feet a year unchecked, and it is the fastest-growing hedge in common use. A hedge left three years is not three times shaggier than one left one year — it is six to nine feet taller and correspondingly wider.
Timing through the year
| When | Suitability |
|---|---|
| Late summer to early autumn | Best — growth finished, shape holds through winter |
| Late spring | Good for a second pass on a formal hedge |
| Mid summer | Fine, with a nest check first |
| Deep winter | Possible but the cut looks raw for months |
| Hard frost | Avoid — cut foliage browns off at the edges |
One annual cut in late summer suits most Leylandii hedges. Where a sharp finish matters, a second lighter pass earlier in the year keeps it crisp through the season.
Nesting birds — the accurate position
Leylandii is popular with nesting birds precisely because it is dense, so this comes up more here than with other hedges. It is worth stating correctly, because the shorthand version puts people off work they could perfectly well have done.
It is not an offence to cut a hedge during the nesting season. The offence under the Wildlife and Countryside Act 1981 is intentionally taking, damaging or destroying a nest while it is in use or being built. So the hedge is checked properly before the machine starts, and any section with an active nest is left until the birds have finished.
The RSPB puts the main season at March to September and suggests cutting outside it where you have a free choice — sound practice rather than a legal requirement. And the 1 March to 31 August ban that gets quoted at householders comes from the Management of Hedgerows (England) Regulations 2024, which apply to agricultural land and expressly exclude hedges within the curtilage of a dwelling house.
Signs it has been left too long
- You can see bare brown wood when you part the foliage.
- The base has gone thin while the top stayed dense.
- It is noticeably wider at the top than the bottom.
- It has spread visibly into the border or over the path.
- You can no longer find the line it used to be cut to.
- It is beyond reach from a step ladder.
Any two of those together and it is worth getting someone to look before another season passes, because the options are narrowing each year.
The economics
An annual cut costs a predictable, modest amount and the hedge never needs anything else. A hedge cut every four or five years costs more each time, looks poor for most of the cycle, and eventually needs a reduction that costs several times a routine cut — assuming there is still enough green left to make one possible.
Ten annual cuts come out cheaper than three reclamation visits, and the hedge is the size you want it for all ten years rather than for a few weeks after each one.
One legal note
There is no maximum lawful height for a hedge, so nobody can require you to cut yours simply for being tall. Two metres is the threshold at which a neighbour can make a high hedge complaint to Wychavon District Council about an evergreen hedge blocking light or access — and Leylandii is squarely within scope of that. Even so, the council cannot order it below two metres or order it removed.
Want your Leylandii on a regular cut?
Tell us how long and how tall it is. We can put it on an annual visit so it stays the size you want.
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