Leylandii hedge annual trimming in Ramsgate: growth rate and the September deadline
Leylandii is one of the fastest-growing common hedges in the UK, putting on up to around a metre a year. That rate is its appeal and its problem: fall behind on maintenance and you are looking at a staged reduction rather than an annual trim, which costs considerably more. The trim window closes at mid-September. A cut after that date drives soft growth into the first frost, and the brown tips it produces stay visible until the following summer.
Wildlife and Countryside Act 1981, s.1
It is an offence to intentionally or recklessly damage or destroy a wild bird's nest while it is in use or being built. The accepted guidance window (RSPB, GOV.UK) for avoiding hedge cutting runs 1 March to 31 August; the Act itself sets no dates. A first trim in late April or May falls within this window. A competent visual check for active nests before each visit is how you avoid committing the offence. Leylandii's dense inner structure provides deep, sheltered nesting sites: look in from the cut face, not just at the outer surface. A nest containing eggs or unfledged chicks means the work must wait. The July-August cut also falls inside the window, so the same check applies to it.
The one rule that changes everything: no cutting into brown wood
Leylandii does not regenerate from bare brown wood. Cut a branch back beyond its green foliage and you are left with a dead stub that will never re-green. This single constraint sets all the other decisions: how much to remove each visit, how often to trim, and what to do if a hedge has been allowed to grow out of hand.
The practical limit is to leave green growth on every branch you shorten. On a hedge that has been maintained to a set width each year, this is straightforward: the annual growth sits entirely within the green zone and a surface trim stays well clear of old wood. On a hedge that has been left for two or three years, the green zone represents only the outermost growth, and the target size may now sit in bare wood. That is the hedge that cannot simply be cut back to size and is a candidate for a staged reduction rather than an annual trim: see the staged Leylandii reduction guide.
The annual trimming programme: month by month
May: first cut, controlling spring flush
Leylandii breaks from dormancy in April and May. A first light trim in late May removes the softest new growth and sets the surface line before the hedge puts on its main summer push. This visit is optional for a well-maintained hedge at a size you are happy with, but it is worth doing if you are actively trying to limit height: Leylandii can add a lot of height in the spring flush alone, and tackling it twice is easier than tackling a whole year's growth in one August pass.
This cut falls within the guidance nesting window. Carry out the nest check before starting work.
July to early August: the main annual cut
The main maintenance trim falls here for most Ramsgate hedges. The hedge is actively growing and recovers quickly from surface trimming. Cutting in this window gives the new growth several weeks to harden before the temperature drops in late September, which is long enough for the tips to firm up and hold their colour through winter.
This visit is the one that keeps a Leylandii hedge at a sustainable size. The approach is the same as the May visit: remove the current season's growth plus a shallow amount of the previous year's, staying well within the green zone. On a twice-trimmed hedge, the July-August cut removes only part of the year's growth. On a once-a-year programme, it removes the full year's growth, which makes for a heavier job but is still within the green zone on a hedge that was trimmed the previous year.
Mid-September: the hard stop
Do not trim Leylandii after mid-September. Any cut after this date stimulates new growth that cannot harden before the first frosts arrive in October and November. The result is brown-tipped foliage that stays visible until the new growth covers it the following summer: months of a damaged appearance on what may be a prominent boundary. Exposure compounds this on an East Cliff or West Cliff frontage. The August cut, finished by early September at the latest, is the safe window. September starts closing.
November to March: dormant season, no trimming
Leylandii is dormant through late autumn and winter. No trimming during this period. If a hedge has reached an unmanageable height, February is the time to plan a staged reduction, when the hedge is fully dormant and wounds callus quickly once temperatures rise in spring. See the staged Leylandii reduction guide for the two-year sequence that brings a tall East Cliff or West Cliff hedge back to a manageable size without killing it.
What drives the price of Leylandii trimming
Leylandii is one of the slower hedges to trim professionally, because the growth is dense and the volume removed per pass is substantial. Height drives the cost more than species: taller hedges require platform access, which adds to both time and equipment.
A routine hedge cut typically costs £120 to £400 depending on length, height, species and access. Heavier reductions on overgrown screens run £300 to £900, and repeat jobs over £500 get 10% off. I quote a fixed price after seeing photos, and I take the arisings away and dispose of them at a licensed waste site.
- Height: a hedge that needs a platform or tower is a bigger job than one that can be cut from the ground.
- Condition: a hedge left for two or more years, or cut back close to the brown-wood line, is quoted per job as a reduction rather than as a routine cut.
- Visits: a two-visit programme (May and August) costs more over the year than a single cut, but the May visit is a lighter job.
- Waste: Leylandii clippings are bulky, so check that disposal is included in any quote.
See the hedge cutting prices guide for what to ask for in a quote.
Leylandii and the law in Ramsgate
High-hedges disputes
A Leylandii screen that has grown above 2 m and is causing a serious, sustained loss of light or access to a neighbouring property can be the subject of a formal high-hedge complaint to Thanet District Council under Part 8 of the Anti-social Behaviour Act 2003. Thanet DC charges £650 to process a complaint. The council will issue a remedial notice specifying a permitted height: it cannot require the hedge below 2 m. Failure to comply carries a fine of up to £1,000. See the full high-hedges guide for Thanet for the process, the evidence required, and the common-law alternative route.
Conservation areas and the s.211 rule
Hedges are normally not covered by conservation area tree rules. But if your Leylandii hedge is within a conservation area (Ramsgate, Ramsgate Royal Esplanade, Ramsgate Montefiore and Pegwell are separate designations) and individual stems have reached 75 mm in diameter measured at 1.5 m height, the s.211 notice requirement applies before work on those stems. The section 211 notice is a trees-only rule: it catches Leylandii when the stems have grown to individual-tree scale, not just because it is a hedge. The rule does not apply to green-leafy surface trimming that does not affect the stem structure. See the Section 211 guide for how the six-week clock works and what constitutes qualifying work.
Want this done properly?
Send a couple of photos and your postcode to hello@ramsgatehedges.co.uk or 07763 100 477. We cover Ramsgate, the East and West Cliff, and the villages of Thanet.
Sources: RHS Leylandii cultivation guidance; Anti-social Behaviour Act 2003 Part 8 (high hedges); Thanet District Council high hedges and conservation area pages; GOV.UK tree preservation and conservation area guidance (s.211, Town and Country Planning Act 1990); RSPB and GOV.UK nesting guidance; Wildlife and Countryside Act 1981 s.1; Ramsgate Hedges & Tree Services own pricing.