← All guides · Reduction and renovation · Updated September 2026

Leylandii hedge reduction in Faversham: from overgrown to under control.

Most of the leylandii hedges I get called out to in Faversham and Ospringe have the same starting point: three or four metres tall, shading half the garden, and nobody quite remembers when it was last cut properly. Here's what actually changes at each stage of bringing one back under control, and why you can't rush it.

Starting point: what an overgrown leylandii hedge actually looks like

The hedges I see have usually been topped once or twice over the years, never reduced. That means a hard cap of brown, dead-looking stubs at the top from an old hack-back, with a few metres of unchecked green growth above and around it. The sides have often crept 40-60cm past the original boundary line. Underneath, the lower branches are thin or bare, because the top growth has been shading them out for years. This is the state most Faversham reduction jobs start from, and it looks worse than it usually is: leylandii keeps its recoverable green growth right up to the last season or two of neglect.

Stage one: find the green zone

Leylandii cannot regrow from bare brown wood, the entire capacity for new shoots sits in the outer green layer, usually 20-30cm deep on a hedge that's had occasional attention, thinner on one that hasn't been touched in years. Before any cutting starts, I press into the hedge face at several points along its length to find where green turns to brown. This tells me how much can safely come off this season and how much has to wait. After this stage, nothing looks different yet, but the reduction plan is set.

Stage two: the first top cut

The Royal Horticultural Society's guidance is to remove no more than 30-33% of the green growth height in a single season. On a hedge that's 4m tall with 1.5m of green growth at the top, that's roughly 45-50cm off, not the metre or more the client often wants gone in one visit. After this stage, the hedge looks visibly lower and less top-heavy, but it is not yet at target height. The remaining brown stub from the old hack-back is still there, just less dominant. This is normal and temporary.

Stage three: the first side cut

Sides come back to the boundary line in the same green-zone-respecting way, usually one side per season if both sides need significant width taken off, to avoid stressing the plant on two fronts at once. After this stage, the hedge has a clean, straight face again on at least one side, even though the overall height target hasn't been reached.

Stage four: the recovery summer

Between the first cut and the second, the hedge pushes new growth through the summer. This is where the visible transformation actually happens: thin patches fill in, the cut face greens over, and the lower branches, now getting light again, start to thicken up. A hedge that looked stark and unevenly cut in May usually looks dense and healthy by September.

Stage five: the second cut, and holding the result

The following spring, a second cut takes the hedge to its final target height and width, again respecting the green-zone limit. From here, two maintenance cuts a year, one in late spring and one in late summer, hold the hedge at that size indefinitely. The end result: a dense, even hedge at the height the garden actually needs, with no permanent brown patches, achieved over one growing season rather than one afternoon.

Before any of these cuts between 1 March and 31 August, the hedge gets checked for active nests. Section 1 of the Wildlife and Countryside Act 1981 makes it an offence to intentionally damage or destroy an active wild bird's nest, and leylandii is regularly used as nesting cover by blackbirds, sparrowhawks and finches. Outside that window is the straightforward default; inside it, a proper visual check comes first.

Sources: Royal Horticultural Society, Leyland Cypress Pruning Guide (rhs.org.uk); Wildlife and Countryside Act 1981, section 1.