Hedge trimming: when to cut, how often, and how far back you can go

The most common garden job there is, and the one with the most misunderstandings attached to it.

How often a hedge needs cutting

It depends almost entirely on what it is. Fast growers like leylandii and privet want two or three cuts a year to stay under control. Beech and hornbeam are usually happy with one, in late summer. Yew is slow enough that one cut a year keeps it immaculate. Box is trimmed once or twice depending on how crisp you want it.

A formal hedge that has been cut regularly stays easy to maintain. A hedge that has been left for several years is a different job, because bringing it back needs more than a trim and sometimes cannot be done in one go.

The legal restriction on timing

Wild birds, their nests and their eggs are protected, and hedges are where they nest. Between roughly March and August a responsible contractor checks a hedge before cutting it and will stop or postpone if there is an active nest. This is the single most common reason a firm declines to cut a hedge in early summer, and it is not them being difficult.

Outside that window, late summer through winter is the usual season for formative and maintenance cutting on most species.

How far back you can cut

This is where hedges are most often ruined. Conifers, and leylandii in particular, will not regrow from old brown wood. Cut back past the green growth and the hedge stays brown on that face permanently. If a leylandii hedge is too wide, the width can only be reduced so far and the honest answer is sometimes that it needs replacing rather than reducing.

Broadleaf hedges are far more forgiving. Beech, hornbeam, hawthorn, privet and yew will all regrow from old wood, so an overgrown one can be cut hard and recover. Yew in particular tolerates severe reduction, which is why ancient yew hedges can be restored.

A common approach for a badly overgrown broadleaf hedge is to reduce one side at a time across two or three seasons rather than all faces at once, so the hedge keeps enough foliage to recover.

The shape matters more than people think

A hedge should be slightly wider at the base than the top. That taper, sometimes called a batter, lets light reach the bottom so it stays furnished with leaf all the way down. Hedges cut with vertical sides, or wider at the top, go bare at the base over time and the bare patch is difficult to recover.

High hedges and your neighbours

There is a formal route for disputes about tall evergreen hedges. Where an evergreen or semi-evergreen hedge of two or more trees is over two metres and is blocking light or access, a neighbour can complain to the council under the high hedges provisions, but only after trying to settle it directly. Councils charge a fee and can order a reduction. It is a last resort rather than a first move.

What to expect on cost

Hedge cutting is generally priced by time and access rather than by the metre, because height, what is underneath, and where the arisings go make more difference than length. A short hedge over a fragile border can take longer than a long one over open lawn. Ask whether clearing away is included, because volume of cuttings is the variable people forget.