← All guides · Seasonal timing · Updated September 2026

Nesting season and hedge cutting in Faversham: from uncertainty to the right result.

The spring calls that give me pause are always the same shape: a hedge that's visibly overgrown, a client who wants it cut that week, and a date somewhere between March and July. Here's what I actually check before a tool goes anywhere near the hedge, and what changes visibly at each stage from survey to the clean cut.

Starting point: the overgrown hedge in a closed window

Most mixed native hedges in Faversham and Ospringe look their worst in April and May. A run of hawthorn and blackthorn that wasn't cut last autumn will be 30 to 50 cm wider than its original line, with loose multi-stemmed shoots extending past the boundary and the top growth shapeless from a year without attention. A leylandii left over winter shows the same: the sides and top have pushed well beyond their last cut position and the whole plant looks like it needs a proper reduction. That is usually when I get the call. The hedge clearly needs work. The question, before any tool comes out, is whether the law allows the cut yet and whether the hedge is clear of active nests.

Stage one: the calendar check

The date is the first question, because it sets what the survey needs to achieve. Section 1 of the Wildlife and Countryside Act 1981 makes it a criminal offence to intentionally damage or destroy an active wild bird's nest while that nest is in use or being built. The protection applies to any wild bird species and any nest in use, in any hedge or tree, and the defences in the Act are narrow. The Act itself sets no calendar dates: 1 March to 31 August is the main nesting season in official guidance (GOV.UK and the RSPB), and I treat it as the working closed window. Late broods, particularly from blackbirds, dunnocks and house sparrows, can run into September, particularly on sheltered, well-vegetated margins. I treat September the same as April: a survey-before-you-cut month, not an automatic clear. From October to the end of February nests are rarely in use, so that period is the sensible one for major renovation work, though an occupied nest is protected at any time of year. After this stage, the calendar tells me whether a survey is required before the cut can proceed.

Stage two: the visual survey from outside the hedge

The outer survey starts before I touch the hedge. I walk the full run looking for four things: visible nest structures showing through the outer face of the hedge (uncommon but it happens on lightly branched or thin hedges), fresh disturbance around repeated entry points where a bird has been pushing through the same gap consistently, noisy alarm behaviour from birds hovering close to the hedge face as I approach, and droppings on foliage directly beneath where a nest entrance would be. On a 20-metre run of mixed hawthorn, this outer survey takes around five minutes. Most of the information about whether nests are present comes from the birds themselves rather than from the hedge face alone. If there are no alarm calls and no signs of repeated entry, the outer survey is clean. After this stage, the hedge looks exactly as it did before, but I have a rough map of where to concentrate the inner search.

Stage three: the survey through the hedge

For mixed native species, I part the outer branches slowly by hand at roughly half-metre intervals along the run, working upward from below so I don't disturb anything above the search point. A blackbird's nest is a structured mud-and-grass cup, typically 10 to 15 cm across, set anywhere between 50 cm and 2 m up from the ground inside the canopy. A dunnock's nest is smaller and set lower, often within 30 cm of the ground. A chaffinch nest is compact and covered in lichen, pressed hard against a main stem, and easy to miss on a quick pass. An old nest from the previous season is dry, compressed and shows no fresh lining or eggs: it is not in use and is not protected. An active nest will be intact with fresh lining material or eggs, and the parent birds will usually appear within seconds of anyone approaching the area. Sparrows, bullfinches and whitethroats are all regular in the hedgerows along the orchard margins east of Faversham, and I find active nests there later into the season than in suburban boundary hedges. After this stage, I know which sections are clear and which need to be left.

Stage four: the cut, or the hold

If the survey comes back clean, the hedge is cut to the agreed shape in the same visit. A clean survey on a hawthorn run means a crisp, even profile along the full length by the end of the day. Where an active nest is found, the section around the nest is left untouched, with a generous margin, until the brood has fledged and the nest is no longer in use, which for small garden birds usually takes a few weeks. On a long run with a single nest near one end, the clear sections are cut in the same visit and the protected section is clearly marked. For a major renovation of the type described in the overgrown hedge renovation guide, finding an active nest mid-run in May can mean splitting the job across two visits several weeks apart rather than completing it in one day. After this stage, the hedge shows either a clean cut along the full run, or a trimmed section alongside an untouched length still holding the active nest inside.

End result: the hedge after the window closes

Once the nesting window closes, the remaining work goes ahead. For a hedge that was held in April or May because of an active nest, the end of August is the sensible start point, with a fresh visual check for late broods before committing to the cut. For a staged leylandii reduction planned across two seasons, the same rule applies: any cut originally scheduled for spring or summer moves to September at the earliest, and October is cleaner. By mid-October, the hedge is at its target size and shape, the nest sites are long since vacated for the year, and the boundary looks tidy and proportionate in both directions. The birds used the hedge through the season undisturbed. The legal position is clear: nothing was damaged because the survey came first and the hold was respected where it was needed.

Sources: Wildlife and Countryside Act 1981, section 1 (legislation.gov.uk); RHS pruning and timing guidance (rhs.org.uk); Garden Ninja (Lee Burkhill, UK), "Pre-Nesting Season Hedge Reduction: Essential Steps for Gardeners" (youtube.com/watch?v=ipmn3x9abyU).