Cut a hedge or tree at the wrong time and you can weaken the plant, lose a year of flowers, or even break the law during bird nesting season. The good news is the timing rules are simple once you know them, and here on the Lincolnshire coast a couple of local factors make the decision even easier.
For most trees, the ideal window is late winter dormancy, roughly November to late February. The tree is not actively growing, there are no leaves in the way so the structure is easy to see, and pruning wounds seal quickly once spring growth starts. It is also when fungal spores and pests are least active.
For established hedges, the main cut is best done in late August or September, once the flush of summer growth has finished and nesting birds have fledged. A tidy at that point holds its shape through winter and into spring. Fast growers such as privet and leylandii usually need two or three cuts a year, typically May to June and again in early autumn, while a slow box or yew hedge is happy with one.
Under the Wildlife and Countryside Act 1981 it is an offence to damage or destroy an active bird's nest. The main nesting season runs from roughly March to August, and hedges are prime nesting habitat for sparrows, blackbirds, dunnocks and wrens. The RSPB advises avoiding hedge cutting altogether in that window.
That does not mean hedge work is impossible in summer. A light trim can go ahead if the hedge has been checked carefully first and no active nests are found. When we survey a hedge before cutting we watch for adult birds repeatedly entering the same spot, and if there is any doubt, that section waits. If your hedge is bordering farmland, note that farmers face an even stricter cutting ban, which is why you see field hedges cut in autumn.
A few species break the winter rule. Cherry, plum and other Prunus trees should be pruned in summer, ideally July or August, because winter cuts leave them open to silver leaf disease, which enters through fresh wounds in cool damp weather. Birch, walnut and maples are best cut in mid to late summer too, as they bleed sap heavily if pruned in late winter.
With spring-flowering shrubs and hedges such as forsythia, flowering currant or a hawthorn you want to blossom, wait until just after flowering. Cut them in winter and you remove the buds that would have flowered, so the plant is healthy but bare. And magnolias resent hard pruning at any time, so with those it pays to do little and often.
Salt-laden easterlies off the North Sea are hard on freshly cut growth. If you trim a conifer hedge just before a spell of cold, drying wind, the exposed inner foliage can scorch brown. Along the coast we tend to bring the autumn hedge cut slightly earlier, into late August, so there is a few weeks of mild weather for the surface to toughen up before winter gales arrive.
Wind also drives most of the urgent tree work we see locally. Storm-damaged limbs, snapped leaders and hung-up branches can and should be dealt with at any time of year, as a torn branch is a bigger risk to the tree and to anything beneath it than an out-of-season cut. Safety work always trumps the calendar.
As a rough guide, trimming a modest garden hedge in this area usually falls somewhere between £60 and £200 depending on length, height and access, while reducing or reshaping a mature tree is more often in the £150 to £600 range. Every job genuinely depends on size, condition and how easily we can get equipment in, so treat those as ballpark figures rather than quotes.
One practical tip: winter is the busiest season for tree surgeons precisely because it is the right time to prune, so if you want dormant-season work done, book in autumn rather than ringing in January. And if your tree is protected by a Tree Preservation Order or sits in a conservation area, you need council consent before any work, which East Lindsey District Council typically takes several weeks to process.
Send a quick message or give Gordon a ring. We will come and have a look, no charge, no pressure.