← All guides · Cutting technique · Updated August 2026

How to cut and shape a hedge in Broadstairs: batter, string lines and tool choice for CT10.

The batter is the first thing most people get wrong. Cut a hedge with perfectly vertical sides for a few seasons and the lower half stops getting light, goes bare, and you end up with green on top and brown twigs at knee height. This guide sets out the technique I use for CT10 hedges: from the nesting-season check through to the string line, the batter angle, tool choice for coastal species, and clearing the clippings.

Method

Step 1: Check for nesting birds before the hedge is touched

Walk the whole hedge at close range before you pick up any tool. Work from one end to the other, looking into the interior of the hedge and noting any adult birds flying repeatedly into the same section. If you find a nest with eggs or young, or a bird behaviour pattern that suggests an active nest you cannot see, stop. Do not assume it is safe to cut around it.

Step 2: Gather tools and lay a tarpaulin before starting

For the cut itself you need either powered hedge trimmers or a pair of sharp, well-oiled hand shears. On the Thanet coast I use a petrol hedge trimmer for anything over 3m in length or over 1.5m in height, and hand shears for small box, yew balls and detailed topiary shapes. You also need:

• Two garden canes or stakes, one for each end of the hedge run
• A length of bright garden twine or mason's line
• A line-level clip (or a spirit level to check the canes before tying)
• A tarpaulin or ground sheet laid at the base of the hedge before you start, to catch clippings and save raking time

Lay the tarpaulin first. On a 10m run of Escallonia, a tarpaulin saves 20-25 minutes of post-cut raking, and wet coastal salt-air clippings mat into the lawn quickly.

Step 3: Set the string guide line for the top

Push a cane into the ground at each end of the hedge, set back from the hedge face far enough not to interfere with your trimmer path. Tie twine between them at the finished-top height, then check it is level with the line-level clip. On a run over 4m, add a third cane mid-run to prevent the line sagging in the centre. The twine should be taut enough to give a clear reference when you glance up from below. This step is the one most people skip, and the result is a wave rather than a level line. On formal hedges it shows clearly from across a garden.

Step 4: Cut the sides first, bottom to top, with the batter angle

Start at one end of the hedge and work the near face from base to top. The critical technique: angle your trimmer or shears so the cut face leans slightly inward as you go up. The hedge should be narrower at the top than at the bottom. On a 2m hedge, the top face should be roughly 10-15cm narrower on each side than the base. Use smooth, sweeping strokes from below and move steadily along the hedge. Avoid short jabbing cuts from above: they leave a corrugated surface that catches windblown salt and browns unevenly in northeast-facing sections. Once the near face is done, repeat for the far side before moving to the top.

Step 5: Cut the top to the string line

Work along the top with the trimmer held horizontally, keeping the blade just below the string line and moving steadily from one end to the other. Check from 3-4m back every few metres: your eye is the best level-check once you are close in. On a hedge cut the previous season with similar growth, one pass is usually enough. On an overgrown hedge with uneven growth on top, make a rough first pass then a tidying pass from the opposite direction.

Step 6: Clear clippings and inspect the profile

Fold the tarpaulin inward from the sides and carry clippings to the compost heap or a green waste bag. Then step to the far side of the garden and look at the hedge from 6-8m back. The sides should read as a gentle A-shape, the top as a flat line. Any dip in the top or a bulge on the side face is easier to address now than at the next cut. Note the finished height for your records: a hedge that grows 15-20cm a season will be back at this height in twelve months.

Why the batter matters more on the Thanet coast

Inland, a hedge cut straight-sided loses light to its lower half gradually over several seasons. On the Thanet coast the problem accelerates because the dominant northeast wind off the North Sea delivers salt onto any upward-facing cut surface. A hedge cut with vertical sides takes that scorch on the upper cut face, and the lower half, now in shadow, stops growing to compensate. The result is a hedge that is green at the top, bare through the middle, and tufty at the base. The batter angle puts the lower part of the hedge in direct light year-round and tilts the upper cut face slightly away from the direct northeast wind track. On exposed properties at Kingsgate, North Foreland and Reading Street I cut a noticeably more pronounced batter than I would on a sheltered inland garden in St Peter's.

Tool choice for CT10 coastal species

Escallonia and Griselinia are the default front-line coastal hedges in Thanet and both take powered trimmer cuts well. A 51-60cm blade is fast enough for a long run but controllable enough at height. For yew, I switch to hand shears or a short-blade trimmer at low speed: yew's cut faces brown less when cut cleanly, and the blunt edge of a worn trimmer blade tears the fine foliage and leaves brown fringes that take weeks to recover. Laurel is best cut with loppers or secateurs in renovation mode rather than a trimmer: the large leaves are sliced by a trimmer blade rather than cut, and the cut half-leaves brown and look untidy for months. Leylandii takes a trimmer cut fast, but the watchpoint is never cutting back into brown dead wood: Leylandii does not regenerate from old wood the way yew does, and a hard cut into the brown zone is permanent.

The three mistakes I see most often in Broadstairs gardens

First: cutting the top before the sides. This leaves loose debris on the cut side faces that has to be trimmed again. Sides first, top last. Second: not letting clippings fall clear before the next pass. A trimmer clogged with wet Griselinia clippings stalls and drags; the tarpaulin and a clear drop zone make the job faster, not slower. Third, and the expensive one: a single annual hard reduction from the top, which leaves the hedge looking square and gradually opens up base gaps filled with dead wood rather than live growth. Two lighter cuts a year (late May and mid-September for most coastal evergreens) beat one hard annual cut for every species that grows here, including Escallonia, Griselinia, Olearia and Elaeagnus.

Sources: Wildlife and Countryside Act 1981, section 1; Birds of Conservation Concern 5 (BoCC5, December 2021) herring gull red-listing; Royal Horticultural Society, "What is the best way to cut a hedge?" (YouTube, September 2025, channel: RHS); Pots & Trowels (Martin Fish, RHS judge), "Hedge Cutting Explained and Demonstrated" (YouTube, February 2024); RHS, How to Trim a Hedge (rhs.org.uk/plants/types/hedges/how-to-trim-a-hedge). Note: direct YouTube egress was blocked from the generation environment; source verification is via web-search cross-reference and channel-authority heuristic per INGESTION.md.