How and When to Prune Laurel Bushes and Hedges

Most laurel bushes and hedges do best with one main prune in late spring or early summer, after the season’s first flush of new growth has hardened off, and an optional lighter trim in late summer. The timing matters more than many gardeners realize, because laurels belong to genera that are susceptible to specific wound infections, and cutting at the wrong time of year raises that risk considerably. The technique matters too: laurels are broad-leaved evergreens, and the tools you reach for will determine whether your hedge looks clean or shredded for months afterward.

Why Laurels Respond So Well to Hard Cutting

Laurels are among the most forgiving evergreen hedging plants when it comes to pruning. Cut one back severely and it will, in most cases, push out a dense flush of new shoots from bare wood within a few weeks. The reason lies in how woody plants regulate branching. When you remove the growing tip of a stem, you remove the primary source of the hormones that suppress lower buds. Research on apical dominance in woody plants has shown that the balance of growth-regulating compounds at each bud, rather than the sheer quantity of any single hormone, determines whether a dormant bud stays dormant or breaks into a new shoot.¹ Removing the leader tips shifts that balance at dozens of buds simultaneously, which is why a pruned laurel fills out rather than just growing one replacement leader.

There is also an energy dimension. Studies on deciduous woody species have found that when the stem tissue near a branch point is depleted of stored starch, lateral branches are released from the suppression imposed by the main stem.² In practical terms, this means a laurel that has been cut back hard will redirect its stored energy reserves into those newly freed buds. That is why renovation pruning works on laurels even when the plant looks like a collection of bare stumps afterward. The root system still holds plenty of energy, and once the hormonal brake is removed, that energy drives vigorous regrowth.

The Best Time of Year to Prune

For most laurel hedges, the ideal window for the main annual prune falls between late May and the end of June in temperate climates. By that point the spring growth spurt has largely finished, new leaves have toughened up, and the plant has the whole growing season ahead to heal cuts and produce fresh foliage before winter. A second, lighter trim in August or early September tidies up any straggly summer growth without stimulating soft new shoots that would be vulnerable to frost.

Avoid pruning in late autumn or winter if you can help it. There are two reasons. First, new growth triggered by a late cut will not have time to harden before cold weather arrives, and frost damage to soft tissue can open the door to infection. Second, wounds made during dormancy take longer to compartmentalize. Research on pruning-wound susceptibility in birch, another deciduous hardwood, found that wounds were most vulnerable to colonization by decay-causing fungi during the early growing season (May in the study’s Scandinavian climate), but that infection risk from cuts made at other times during the growing season was also elevated compared to the dormant period, albeit considerably less severe.³ The practical lesson is that wound healing and infection resistance vary by season, so timing your cuts to coincide with the plant’s period of most active growth gives wounds the best chance of closing quickly.

Why Timing Matters Even More for Cherry Laurel

The most popular hedging laurel in the UK and much of Europe is cherry laurel (Prunus laurocerasus). In North America, the same species is widely planted and sometimes called English laurel. This is a member of the Prunus genus, the same group that includes cherries, plums, and almonds, and that family connection brings a specific disease concern: bacterial canker, caused by Pseudomonas syringae. Research on sweet cherry, a close relative, found that pruning wounds made in spring and summer led to the highest canker incidence and severity when the bacterium was present, with heading cuts (cuts that remove the end of a branch) resulting in the highest tree mortality at 86%.⁴ That same study observed that heading cuts became resistant to infection after about one week in summer and roughly three weeks in winter.

What does this mean for your cherry laurel hedge? It means you should avoid pruning when bacterial canker pressure is highest in your area, which is typically during wet, cool weather in spring and autumn. If you prune during a dry spell in early to mid-summer, the wounds dry and seal more quickly, and airborne bacteria have less moisture to help them colonize. If you notice oozing, sunken lesions on branches after pruning, that is likely canker, and the affected wood should be cut back to healthy tissue well below the lesion, ideally during dry weather. Clean your tools between cuts with a disinfectant to avoid spreading the pathogen from branch to branch.

Secateurs, Not Hedge Trimmers

This is the single most common piece of advice from experienced gardeners about laurel, and it is worth taking seriously. Laurels have large, leathery leaves. Electric or petrol hedge trimmers slice through those leaves indiscriminately, leaving behind ragged half-leaves that turn brown and look unsightly for weeks or months. Hand pruning with sharp secateurs (or loppers for thicker branches) lets you cut individual stems just above a leaf node, leaving the remaining foliage intact.

For a small laurel bush or a short run of hedge, this is straightforward if a little time-consuming. For a long hedge, it becomes genuinely laborious, and most people compromise. A common middle ground is to use hedge trimmers for the top of the hedge, where shredded leaves are less visible, and secateurs for the sides at eye level. Another approach is to use the trimmers for the rough shape and then go back and snip off any conspicuously damaged leaves by hand. The brown edges will eventually be hidden by new growth, but if you want the hedge to look good immediately after pruning, the hand-pruning effort pays off.

Portuguese laurel (Prunus lusitanica) has noticeably smaller leaves than cherry laurel, and some gardeners find that hedge trimmers cause less visible damage on it. Even so, a clean secateur cut heals faster and looks better on any broad-leaved evergreen.

How to Shape a Laurel Hedge

The goal with most laurel hedges is a shape that is slightly narrower at the top than at the bottom. This tapered profile ensures that sunlight reaches the lower branches, which keeps the base of the hedge dense and green. A hedge that is wider at the top will shade out its own lower growth over time, producing a leggy, bare-based look that is hard to reverse without drastic renovation.

When pruning for shape, work from the bottom up and from the inside out. Start by removing any dead, damaged, or crossing branches from inside the hedge. Then trim the sides to your desired width, cutting each stem back to a point just above a bud or side branch that faces in the direction you want new growth to go. Finally, trim the top to your target height. If the hedge has not yet reached the height you want, leave the leaders (the upward-growing stems at the top) uncut and only trim the sides. Once the hedge reaches its intended height, start cutting the leaders each year to encourage them to thicken rather than keep climbing.

For a formal look, stretch a line of string between two canes at the desired height and use it as a cutting guide. For a more informal, naturalistic shape, just eyeball it and accept a bit of unevenness. Laurel’s large leaves make it less suited to the razor-sharp geometric profiles you might see with yew or box; a slightly softer outline tends to look more natural.

Renovation Pruning for Overgrown Laurels

One of laurel’s great strengths is its ability to regenerate from very hard pruning. If a hedge has grown too wide, too tall, or too leggy, you can cut it back dramatically and it will recover. Cherry laurel and Portuguese laurel will both regrow from bare stumps, though cherry laurel is faster about it.

The standard approach for renovation is to cut all stems back to about 30 to 60 centimeters (roughly one to two feet) from the ground. Do this in late spring, around April or May, when the plant is gearing up for its main growth push. You will be left with an ugly collection of bare stumps, but within a few weeks you should see clusters of new shoots emerging from the cut surfaces and from dormant buds along the remaining stem. By the end of the first growing season, the hedge will look green again, though it will take two to three years of shaping to rebuild a dense, well-filled hedge.

If you are nervous about cutting the whole hedge at once, you can spread the work over two years. In the first year, cut one side of the hedge hard and leave the other side untouched. The following year, once the first side has started to fill in, cut the second side back. This approach keeps some screening in place during the recovery period, which matters if the hedge is your main privacy boundary.

Feed the hedge after hard pruning. A general-purpose fertilizer or a thick mulch of well-rotted compost around the base will give the recovering plant the nutrients it needs to fuel all that new growth. Water during dry spells, especially in the first summer after renovation, because the reduced leaf area means the roots are not pulling water as efficiently, and new shoots are vulnerable to drought stress before they are fully established.

Different Laurels, Different Needs

The word “laurel” covers several distinct plants, and their pruning requirements are not identical.

Cherry laurel (Prunus laurocerasus) is the fast-growing, large-leaved workhorse of hedge planting. It can put on 30 to 60 centimeters of growth a year in good conditions, which means it needs pruning at least once a year to stay in check. It tolerates hard renovation pruning well.
Portuguese laurel (Prunus lusitanica) grows more slowly, has smaller, darker leaves, and tends to produce a more refined-looking hedge. It still responds well to pruning but needs it less often, and it is slightly less vigorous at regrowing from very old wood.
Bay laurel (Laurus nobilis) is the culinary bay tree. It is often grown as a free-standing shrub or standard rather than a hedge, and it is less cold-hardy than the Prunus laurels. Prune bay in summer after flowering, and avoid hard cuts into very old wood, as it is slower to regenerate than cherry or Portuguese laurel. In colder climates, bay is frequently grown in pots and overwintered under cover, so pruning is mainly about maintaining shape.
Spotted laurel (Aucuba japonica) is not closely related to the others but is commonly called laurel. It is a shade-tolerant, slow-growing shrub that rarely needs more than a light trim to remove wayward branches. Prune in spring.

Cherry laurel and Portuguese laurel share the Prunus bacterial canker susceptibility discussed earlier. Bay laurel belongs to a completely different plant family (Lauraceae) and does not face the same canker risk, though it has its own vulnerabilities to scale insects and bay sucker.

Common Mistakes and How to Avoid Them

Pruning too late in the year is probably the most widespread error. Cutting laurel in October or November stimulates a flush of soft growth that gets hammered by the first hard frost, leaving the hedge looking worse than if you had not pruned at all. If you missed the summer window, it is usually better to wait until the following spring.

Cutting at the wrong point on the stem is another frequent issue. Always cut just above a leaf node or a visible bud, angled slightly away from the bud so that rainwater runs off the cut surface rather than pooling on it. Cuts made in the middle of an internode (the bare stretch of stem between two leaf joints) leave a stub that dies back, providing a potential entry point for disease and looking untidy.

Removing too much at once from a hedge that is already stressed can also cause problems. If the plant is struggling with drought, waterlogging, or heavy pest pressure, hard pruning removes a large proportion of its food-producing leaf area right when it can least afford it. In those situations, address the underlying stress first. Water a drought-stressed hedge for a few weeks before pruning, or improve drainage around a waterlogged one. Once the plant looks healthier, then prune.

Finally, some gardeners neglect to clear up clippings. Laurel leaves decompose slowly, and a thick mat of them at the base of the hedge can smother ground-level buds and encourage fungal problems. Rake up the clippings and compost them or dispose of them. Cherry laurel leaves contain compounds that release small amounts of hydrogen cyanide as they break down, which can slow composting; mixing them with plenty of green, nitrogen-rich material helps the heap work through them faster.

Laurel Clippings and Garden Safety

The cyanogenic glycosides in cherry laurel are worth knowing about, especially if you have pets or small children. The leaves and seeds contain prunasin, which can release hydrogen cyanide when the tissue is crushed or chewed. In practice, the bitter taste is a strong deterrent, and poisoning from casual contact with hedge clippings is extremely rare. The concern is more relevant if you are shredding large volumes of clippings in an enclosed space, since the crushed leaves release a noticeable bitter-almond smell that indicates cyanide gas. Work outdoors and avoid breathing in the fumes when chipping cherry laurel branches. Portuguese laurel contains the same compounds at lower concentrations. Bay laurel (Laurus nobilis) does not produce cyanogenic glycosides and is, of course, the one you can safely cook with.

If you are burning laurel clippings, do so in a well-ventilated area and stand upwind. Many local authorities include laurel in their guidance on green waste that should not be burned in confined garden incinerators. Composting is generally the better option, and the cyanide compounds break down during decomposition, so mature compost from laurel leaves is safe to use in the garden.