Yew hedge trimming in Rochester: the questions we get most often.

Q. When do I actually cut a yew hedge? Mine was last done three years ago.

A. The window is late August into the first two weeks of September. That is it - yew wants a single annual cut, not multiple trims through the year. Cut earlier than late August and you risk encouraging a late flush of soft new growth that the first autumn frosts then knock back and brown. Cut later than mid-September and you are leaving freshly cut surfaces going into winter without time to harden off properly. Three years between cuts is fine for the plant's health; it just means the job is bigger. We would still do it in that same window, because the timing is correct for the species regardless of how long it has been left.

Q. Why can't I do it in July? I can see nothing is nesting in it right now.

A. Because the law is not conditional on whether you can see a nest. Under section 1 of the Wildlife and Countryside Act 1981, intentionally damaging or destroying an active bird's nest is an offence, and a nest you could not see is still a nest. The nesting season runs roughly 1 March to 31 August, and "I looked and saw nothing" is a weak position if a nest turns up in what you cut. Yew is dense enough that finding a nest by eye is genuinely difficult even for an experienced person, and the birds that favour it in Rochester's older gardens - blackbirds, song thrushes, dunnocks - are not always obvious. For anything heavier than a light face-trim during the nesting window, our advice is always to wait until September. The penalty for a conviction is an unlimited fine, up to six months in prison, or both, and we have no interest in exposing our clients or ourselves to that.

Q. My yew has grown well over a metre past where it should be. Can it actually be cut back that hard without dying?

A. Yes, and this is the fundamental difference between yew and a conifer like leylandii. Yew regenerates freely from old wood, including apparently dead brown timber from ten or twenty years ago. You can cut back into that old wood and get healthy new growth in the following growing season. We usually do staged reductions over two to three years rather than taking everything back at once - one side in the first year, the top in the second, the opposite side in the third - partly to avoid stressing the plant and partly because removing all faces at once on a very large specimen can slow the recovery. But if you have a yew hedge in Borstal or on one of the older properties up in Frindsbury that has genuinely doubled in width over the last decade, there is no reason to rip it out and start again. It can be brought back, in the right season, with staged work. See our overgrown hedge renovation Q&A for more on the staged-reduction approach across species.

Q. My yew hedge is inside the Rochester Conservation Area. Does that change what I need to do before cutting?

A. It can, depending on stem diameter. Section 211 of the Town and Country Planning Act 1990 requires six weeks' written notice to Medway Council before cutting, uprooting or carrying out work on any tree in a Conservation Area (including a hedge plant that has grown to tree size) with a stem exceeding 75mm in diameter at 1.5 metres from the ground. A well-established yew hedge often has individual stems well above that threshold, particularly on the older properties around Boley Hill, The Vines and the streets close to the Cathedral precinct. The work is not prohibited - Medway Council has six weeks to decide whether to make a Tree Preservation Order, and if it does not, you can proceed - but doing it without the required notice where one was needed is an offence under section 210, which carries a fine of up to £20,000 in the magistrates' court, and unlimited in the Crown Court. We always check Conservation Area status and run a quick stem check before we quote for any significant yew work. If you are unsure whether your property falls within the area, the Conservation Area rules Q&A explains where the boundary sits and how to confirm it.

Q. I have a dog that goes under the hedge. Are the clippings actually dangerous?

A. Yew is genuinely toxic. All parts of the plant except the red aril surrounding the berry contain taxine alkaloids, and the clippings are the main practical risk because dogs and horses will sometimes eat wilted trimmings left on the ground when they would not touch the living hedge. The effect on dogs is rapid cardiac toxicity and it can be fatal at small doses, so this is not a theoretical concern. We bag and remove all yew clippings on every job as standard practice, and we tell every client with dogs, horses or small children the same thing: do not compost yew clippings and do not leave them accessible on the lawn or in a barrow. If you are cutting your own hedge, the clippings go in the green waste or a contractor takes them, not on the compost heap or in a pile by the gate.

Q. One side of mine has gone quite bare and patchy. Can it be filled back in?

A. Usually yes, if the bare patches are on the outer face rather than deep inside the canopy. Outer bare patches on yew almost always come from cutting too hard in the wrong season, taking back all the green growth in one pass and exposing brown wood that does not then get enough light to regrow. Recovery typically takes one to two growing seasons with correct cutting: shorten slightly less aggressively, keep the face angled outward rather than dead vertical (which lets more light reach the lower growth), and make sure the late-August cut is the only one. Bare patches deep inside the canopy are harder to reverse because no light penetrates, but on the outer face the plant will generally fill back in given the right conditions. If your hedge is on a south-facing wall in ME1 and the lower third is bare at the base, it may also be compacted chalk-and-clay soil competing with the roots; a surface mulch and slow-release feed often makes a visible difference within a season.

Q. Someone told me I should cut yew twice a year for a neater finish. Is that right?

A. It depends on the form. For a hedge run, once a year in late August to early September is correct, and that is what the RHS recommends as standard for Taxus baccata hedges. Cutting more frequently does produce a tighter surface temporarily, but it also steadily removes more of the active growing tissue than the plant replaces between cuts, and over time you tend to get a shallower surface that is more prone to browning under stress. For topiary features rather than hedge runs - cones, balls, cloud shapes - two cuts a year is standard practice, and we offer that as part of our formal topiary service. But for a straight hedge run, including the substantial yew hedges around some of Rochester's older properties and the churchyards in St Margaret's and Strood, one careful annual cut in the correct window consistently produces the best long-term result.