My box hedge needs cutting but I keep missing the right window. The timing questions we get every early summer.

Q. When do I actually cut my box hedge? I hear contradictory advice all the time.

A. The traditional answer is Derby Day, the first Saturday in June, and it is genuinely good advice rather than gardening folklore. By early June the spring flush of new growth on established box has hardened enough to clip cleanly and hold its edge. Cut before that, into soft new growth in April or early May, and the tips often wilt and pale before recovering. For a straightforward formal hedge that you want to look tidy through summer and into winter, one cut in early to mid-June is enough in most Rochester gardens. If you want really crisp topiary edges, a second light pass in August once the summer growth has pushed through keeps the lines tighter, but it is optional rather than essential.

Q. Why is June the target? My neighbour cuts his in April and it looks fine.

A. An April cut often works if it is genuinely light, a quick tidy rather than a structural clip. The issue is that cutting meaningfully into unripe growth before late May leaves the freshly cut surfaces open to scorch from stronger spring sunlight, and the soft tips can collapse rather than hold a clean edge. June is the safer window not because box refuses to respond to an earlier cut but because the growth has genuinely thickened and hardened by then, and the result holds better through summer. If your neighbour's hedge looks good after an April cut, it is probably because he cuts lightly, or because his box is in a more sheltered position with less direct midday sun than yours.

Q. I want to cut in late May or June but someone has mentioned the nesting law. Do I need to worry about that with a low box hedge?

A. Worth taking seriously, yes. Box makes a dense, low hedge that robins, wrens and dunnocks will sometimes nest in, particularly in Rochester gardens that back onto old walls, or where the box runs along a sheltered boundary near the Cathedral precincts or in the Boley Hill area. The Wildlife and Countryside Act 1981, section 1, makes it an offence to damage or destroy an active bird's nest, with an unlimited fine, up to six months in prison, or both. The Act gives no fixed dates, but GOV.UK guidance points to 1 March to 31 August as the main nesting window, and "I did not look first" is not a workable defence. In practice, what we do before any cut during that window is look into the hedge carefully from every angle, in good morning light, before the trimmer starts. If we see a sitting bird, a cup-shaped structure or eggs, we stop and come back in four to five weeks. Box trimming in June is not usually complicated by the nesting law, but the check takes two minutes and skipping it is not worth the risk.

Q. After cutting, the outer edges of my box go brown. Is that die-back or am I doing something wrong with the timing?

A. Almost always it is scorch rather than die-back. The freshly clipped inner leaf surface is exposed and will desiccate in strong afternoon sun within a day or two of cutting, turning yellow-brown at the tips. The RHS recommends cutting box on a dry, overcast or lightly cloudy day, and it is worth following: if you cut on a warm afternoon in full June sun, expect the brown tips to be visible for three to four weeks until new growth covers them. They are cosmetic, not a health problem. Where it does become a health question is if the browning is deep into the hedge structure rather than just on the clipped surface, or if you see pale strands and tiny dark dots on the affected stems, which are the signs of box blight rather than scorch. If you are not sure which you are dealing with, our box blight Q&A covers the diagnosis in detail.

Q. How many times a year does box actually need cutting to stay neat?

A. Once a year is standard for a formal hedge. Twice a year, once in early June and a second light pass in August, if you want really tight topiary lines. Three or more cuts is rarely necessary for a hedge and starts to work against the plant: box recovers from cutting by putting energy into new growth, and repeated clipping before that recovery is complete leaves hedges thin and open at the base over time. A common mistake I see in Rochester gardens, particularly on thin chalk ground up at Delce and Nashenden, is over-cutting a box hedge that is already underfed. The hedge never builds enough root energy to produce dense new growth before the next cut, and after a few years it looks permanent bare patches at the base rather than a tight, solid face.

Q. My box is old and very overgrown, more like a large shrub than a tidy hedge. Can I cut it back hard and will it recover?

A. Yes, and this is one of the things box does well that a lot of people do not know. Unlike leylandii or most conifers, box regenerates from old wood: cut back into thick, dark stems and it will push new buds from the trunk. Recovery is slower than yew, expect two growing seasons before the hedge looks presentable again, but it is reliable if the plant is fundamentally healthy. The right time to do a hard renovation is late winter, January through to early March, before the spring flush starts and before the nesting season opens on 1 March. Cutting hard in June or later leaves the plant with less growing time to recover before the next winter. Pair a hard cut with a slow-release fertiliser in spring, and if the soil is dry chalk soil common in parts of Cuxton and along the higher ground above the Medway valley floor, a bark mulch to hold moisture through the summer will help. If the plant is unhealthy rather than merely overgrown, blight is the most common culprit and our box blight Q&A covers how to tell the difference and whether renovation is worth attempting.

Q. My box hedge is mature and I am in the Rochester Conservation Area. Do I need to notify Medway Council before doing a hard cut?

A. Only if any stem has grown to 75mm or more in diameter measured at 1.5m from the ground. At that point, section 211 of the Town and Country Planning Act 1990 requires six weeks' written notice to Medway Council before any pruning or removal work. Medway is a unitary authority so it is Medway Council that administers this, not Kent County Council. A compact, well-maintained box hedge kept to 60cm or 90cm height rarely reaches the 75mm stem threshold, but an old hedge that has been left to grow informally for years or decades can. If you are uncertain, the address check on Medway Council's planning portal confirms whether your property falls inside the Conservation Area boundary. If it does and the stems are anywhere near the threshold, come back to us with the stem measurement and we can advise on whether a notice is needed before touching it. Our Conservation Area Q&A covers the notice process and the two-year consent window in full.