Particulars of the job
- Species
- x Cupressocyparis leylandii (Leyland cypress)
- Season
- Outside nesting season, September to February preferred
- Access
- Ladder or MEWP for screens over 4m; most Weald garden screens manageable from a ladder
- Time required
- Depends on length and height; first-stage cut, then a second stage the following winter
- Tools
- Petrol hedge trimmer for the face, chainsaw for structural stems, rope-and-harness for anything above ladder height
- Permission needed
- None for routine reduction, unless stems exceed 75mm inside the Tenterden CA or a village CA
Leylandii is one of the hedges I am asked about most often, usually a screen planted decades ago that's now 4 or 5 metres tall and blocking light. The good news is it can be brought back down. The bad news is it has to be done correctly, in stages, or you end up with a permanent brown, dead face that never recovers.
Why you can't just cut it back hard in one go
Leylandii, like most conifers, doesn't regenerate new growth from old brown wood, only from the green, needle-bearing zone. Cut back past that line in one pass and the exposed brown wood stays brown and bare, permanently, and the only fix is to cut that section out and replant. That's the single most common mistake I see on Leylandii jobs done by someone without conifer experience: an aggressive one-shot reduction that looks fine for a week and then reveals a permanent dead face once the clippings are cleared.
Why staging also suits a tall screen on clay
A tall, dense Leylandii screen carries a large canopy on a relatively shallow root system, and heavy clay that is waterlogged in winter holds roots less firmly than free-draining ground. I am not claiming a hard cut will topple a hedge, but taking the height off in two steps is gentler on the plant, avoids a sudden shock to a screen that has stood for decades, and gives the sides time to green up before the final cut. If a tall conifer already leans or has lifted at the base, get a qualified arborist to look at it.
The staged approach
- First cut: reduce to an intermediate height and width, staying inside the green zone on every face. This immediately reduces the wind sail area without removing so much foliage that the plant is shocked or the roots destabilised in one step.
- Recovery period: allow a full growing season (spring to autumn) for new growth to fill in the sides and soften the cut lines.
- Second cut, the following winter: drop to the final target height and width, again staying inside the green zone. By this point the sides have had a season to fill in, which makes the final cut safer for the hedge.
Total cost across two stages runs higher than a single-visit hard cut, but it is the approach that keeps a green face on the hedge. I explain both options honestly at quote stage: a one-shot hard reduction is cheaper and faster, but I won't do it on a mature screen without being clear about the brown-face trade-off first.
Nesting season and Leylandii
Dense evergreen Leylandii is attractive to nesting birds year-round in a mild winter, so even outside the main caution window I do a quick visual check before cutting. See the nesting season guide for the full rules.
Pricing
A staged Leylandii reduction on a typical Tenterden or Weald-village garden screen is quoted per job after seeing photos and the postcode, and depends on length, height and access; the general range for reductions is on the hedge reduction page. I quote each stage separately so the cost is transparent and there's no obligation to book the second stage with me if you'd rather get a second opinion once you've seen the first result.
Got an overgrown Leylandii screen?
Send photos and the postcode and I'll give you an honest first-stage quote, including whether a staged approach is genuinely needed for your specific hedge. Get a quote or call 07763 100 477.
Related guides
Sources: RHS Leyland cypress pruning guidance; Wildlife and Countryside Act 1981 s.1.