Formal Hedge Service
Box, yew, privet, hornbeam and beech clipped to architectural lines, on the understanding that a formal hedge is a piece of built structure and not a shrub with a haircut.
Formal work is priced by the hour it actually takes
A formal hedge is judged from ten metres away, along its length, in flat light. Nothing hides on it.
An ordinary boundary hedge forgives a lot. A wobble of two centimetres in the top of a mixed privet run reads as texture. The same wobble in a clipped yew buttress beside a front door reads as sloppy work, because the eye has a straight line to compare it to. That is the whole reason formal clipping costs more per metre than a Hedge Tidy: it is not a different machine, it is a different tolerance.
In practice that means freshly sharpened blades, because a blunt blade tears rather than cuts and torn leaf edges brown off within days on box and yew. It means string lines and a level set out before anything is started, and canes at the ends of a run so the top is cut to a datum rather than to the shape the hedge already has. It means more than one pass: a first cut to take the growth off, then a light second pass down the line to take off the few centimetres of proud growth that only become visible once the bulk has gone.
It also means cleaning blades between hedges, and often between plants. Box blight spreads on tools and on wet clippings. Anybody moving a trimmer straight from one box hedge to the next without cleaning it is doing the disease a favour.
The five formal hedges we work on most in Kent
Box (Buxus sempervirens)
The finest small-scale formal hedge there is, and the most troubled. Two light clips, the first from late May once the risk of a hard frost on soft growth has passed, the second in late summer. Cut in dry, dull weather rather than hot sunshine, because scorched cut edges on box are slow to grow out.
Yew (Taxus baccata)
The forgiving one. Yew is the only common conifer that will reliably break from old wood, so a yew hedge that has gone too wide can be cut back hard, one face at a time over successive seasons, and will refurnish. Slow growing, dense, and content with a single cut in late summer. If you want a formal hedge that will still be recoverable in twenty years, plant yew.
Privet (Ligustrum ovalifolium)
Vigorous, cheap, tolerant of hard pruning and quite happy being cut into old wood. The catch is speed: privet needs three cuts through the season to look genuinely formal, from late spring to early autumn. On two cuts it looks tidy. On one it looks like a privet hedge that gets cut once a year.
Hornbeam (Carpinus betulus)
Marcescent, meaning it holds its dead leaf through winter and gives you a russet screen when a beech next door has thinned. Hornbeam copes far better than beech with heavy or wet clay, which covers a great deal of Kent. One cut, August, and it holds a crisp line right through to spring.
Beech (Fagus sylvatica)
Also marcescent, with a warmer, softer winter colour and a finer leaf than hornbeam. Beech wants free-draining ground and sulks on wet clay, which is why so many struggling beech hedges in the Weald should have been hornbeam. Single August cut, same as hornbeam. Do not cut beech in spring growth if you want a good winter hold.
Timing on all five is checked against the hedge in front of us rather than the calendar. A late spring, a dry August or a hedge growing in deep shade all shift the dates. Under HedgeCare we hold those dates for you and book the visits before the season arrives.
What we look for on every box hedge
Two problems have changed box hedging in this country, and neither is solved by cutting harder.
- Box blightCalonectria pseudonaviculata. Dark leaf spots, black streaking on young green stems, sudden bronzing and bare patches, usually starting low and inside where the air is still. It travels on tools, boots and wet clippings. We cut and bag affected growth instead of leaving it in the hedge, clean blades between hedges, and thin congested tops so air moves through.
- Box tree caterpillarCydalima perspectalis. Look for webbing spun through the foliage, stripped stems with the leaf skeletons still attached, and small green caterpillars with dark stripes. It defoliates fast, sometimes in weeks, and there can be several generations in a season. Early detection is most of the battle, which is why a hedge inspected twice a year is in a far better position than one visited once.
- What we will not claimThat we can cure either. We can manage them, slow them, keep the hedge in better condition than it would otherwise be, and tell you plainly when a box run has reached the point where replacement makes more sense than another season of nursing.
- Alternatives worth hearingWhere a box run has failed and you want the same look, small-leaved options such as Japanese holly (Ilex crenata) or a tightly clipped yew hold a comparable line without the same disease pressure.
Topiary, finials and ornament
We maintain existing topiary along a formal hedge line, and we will cut new finials, buttresses, balls or cones where the hedge genuinely suits it. Yew and box carry ornament best, given enough age and density to hold a shape without showing daylight through it.
What we will not do is sell you ornament for the sake of it. A finial cut into a thin privet hedge that cannot fill it, or a row of cones on a boundary nobody looks at, is money spent on something that will look worse each year. A clean straight top is never the wrong answer.
Only where it belongs
When another service is the right one
If your formal hedge has drifted out of line rather than simply grown, the work you want is Hedge Shape first, with formal clipping taking over as the annual cycle once the lines are true. If it has gone well over the height or width you want, start with Hedge Reduction. If it has been left for years and lost its structure entirely, that is Hedge Rescue, staged across seasons.
Every formal job is worked to The Kent Hedge Standard, which on this service matters most at points one, five and ten: straight lines set out with a line, clippings blown out of the top rather than left to brown off inside the hedge, and the finish shown to you while we are still on site and able to change it.
Formal hedges, asked and answered
How many times a year should a formal hedge be clipped?
Box wants two light clips, the first in late May or early June and the second in late summer. Privet holds a formal edge properly only on three cuts through the growing season, and will look respectable on two. Yew is content with one cut in late summer, though a second light pass gives a sharper finish. Beech and hornbeam are single-cut hedges, best done in August.
Can a formal hedge that has lost its shape be squared up again?
Usually, but not in one visit. A formal hedge that has been rounded off or allowed to drift is brought back over two or three seasons, cutting slightly inside the old line each time and letting the hedge thicken into the new one. Yew tolerates the fastest recovery because it will break from old wood. Box is slow. Beech and hornbeam are somewhere in between.
What is box blight and can you treat it?
Box blight is a fungal disease, Calonectria pseudonaviculata, that causes dark leaf spots, black streaking on young stems, sudden bronzing and bare patches. We do not sell a cure, because there is no reliable one. What we do is spot it early, cut and bag the affected material rather than leaving it in the hedge, clean blades between hedges so we do not carry spores from one garden to the next, thin the hedge to move air through it, and advise on whether the run is worth keeping or better replaced.
Do you cut topiary and finials?
We maintain existing topiary, balls, cones, buttresses and finials on a formal hedge line, and we will cut new finials into a hedge that suits them, usually yew or box with enough age and density to hold a shape. We will not talk a customer into ornament that does not fit the hedge or the house. A poorly placed finial on a thin hedge looks worse than a clean straight top.
Have your formal hedge looked at properly
Tell us the species, the length and how sharp a finish you want. We will set the clipping cycle, check the hedge for blight and caterpillar, and quote for the year rather than for one visit.