March pruning: These plants benefit from a trim now.

March is the month when a few well-judged cuts can set your garden up for an outpouring of flowers and scent in summer.

In the narrow window between the first mild days and the last night frosts, one of the most important gardening jobs of the year comes round. What you do in March determines whether roses, hydrangeas, lavender and more will be bursting with vigour in a few months’ time-or whether they’ll look tired and sparse. With a little know-how and a properly sharp pair of secateurs, you can get noticeably better results from the same plants.

Why March pruning is so decisive

By March, many shrubs and trees are almost out of their winter dormancy, yet they still haven’t produced lots of soft, new growth. That timing makes March ideal for removing older wood and refining a plant’s shape: cuts close up quickly and the remaining buds usually push strongly.

Pruning well in March influences a plant’s shape, the volume of flowers and its overall health for the whole season.

That said, mistakes can be costly. Cut too early and late frosts can damage freshly exposed growth; cut too hard on the wrong species and you can remove the year’s flowers entirely. The plants below generally cope particularly well with March pruning-provided you follow the right approach.

Espalier trees: keep feature plants and screens in shape

Whether they frame a patio or create a living privacy screen, espalier limes (lime trees), espalier plane trees and evergreen espalier laurel benefit from a neat, purposeful shape prune in March.

Training young espalier trees: tie in rather than shorten

With newly planted or still-young trees, the priority is guidance rather than heavy cutting:

• Remove only shoots that are too long or growing across the intended framework.
• Secure the remaining branches firmly to the support structure with appropriate ties (for example, a soft tree tie).
• Don’t remove the main framework branches that are meant to fill the future espaliered canopy.

If you cut too aggressively at this stage, you can end up later with a gappy structure instead of an even green panel.

Two pruning options for established espalier trees

For trees that have been on their framework for several years, you can choose between two clear strategies:

• Cut back to older wood: Reduce all young shoots back to the older side branches. The result is a cleaner structure with fewer-but stronger-new shoots.
• Block “hedge-style” trim: Especially with espalier plane trees or evergreen laurel, prune as you would a hedge, trimming all protruding growth into a uniform rectangular outline.

A block-like shape is particularly practical when the espalier is primarily there as a dense green screen.

Roses: a firm cut now for abundant flowers later

Roses may look delicate, but in March they tolerate a strong prune-and repay it with far more blooms.

Bedding roses and standard roses: cut back with confidence

Older, brown, tired-looking stems should be removed. You’re aiming to keep only a few strong basal canes, which should be:

• cut back to just a few buds above ground level,
• ideally cut to an outward-facing bud,
• cut on a slight slope so rainwater runs off.

The plant can look almost pitiful afterwards-yet this is exactly what encourages vigorous, fresh new growth and lots of buds in summer.

Climbing roses: train the framework, then shorten sides

Climbing roses don’t respond well to the same radical approach. Instead:

• select three to four strong main stems,
• tie them in horizontally or in a fan shape on supports,
• shorten side shoots to just above the second bud,
• remove dead or fully dried-out stems right back.

When the main stems are trained more horizontally, flower buds form along much more of their length-so you get blossom across the whole wall rather than only at the tips.

Lavender and heather: tight cushions instead of woody, bare shrubs

Lavender: prune hard every year

To stop lavender becoming bare at the base over time, it needs a decisive March prune. A reliable rule of thumb is:

Each year, cut lavender back to around 15 centimetres above the ground-but don’t cut into completely old, leafless wood.

This applies to both common lavender and French lavender. If you skip pruning, plants tend to produce long, thin shoots with fewer flowers, while the lower parts become increasingly woody and sparse.

Heather: prune according to type

Heather is low-maintenance, but it only stays dense and floriferous if you prune it regularly. The key is knowing which kind you have:

Heather type	Pruning time	Cutting height
Summer heather (Calluna)	March	8–12 centimetres above the ground
Winter heather (Erica)	Summer	also just above the old wood

Always cut just above the woody zone. If you leave only old, bare stems, the plant often struggles to reshoot properly.

Hydrangeas: prune without sacrificing the flowers

With hydrangeas, the correct approach depends heavily on the variety. If you simply shorten every stem, you may end up with very few blooms.

Mophead hydrangeas and lacecap hydrangeas

These types form their flower buds on growth made the previous year. In March, it’s usually enough to:

• remove only a portion of the oldest, thickest stems (around one fifth), cutting them out low down,
• snip off spent flower heads just above the first strong pair of buds,
• avoid cutting lower than that, or you’ll remove the future flowers.

This renews the plant gradually while still protecting a generous display.

Panicle hydrangeas and smooth hydrangeas

Popular panicle hydrangeas bloom on new wood, so you can be more robust:

• cut panicle hydrangeas back to about 40 centimetres,
• cut the smooth hydrangea cultivar ‘Annabelle’ down even harder, to roughly 10 centimetres.

From those short stubs, strong new stems develop over summer, carrying large flower heads.

Special cases: oakleaf hydrangea and climbing hydrangea

Oakleaf hydrangeas can be shortened lightly at the base, around 10–20 centimetres above the ground. If the plant is growing as a specimen, thinning out a few older stems is often all that’s needed.

Climbing hydrangea is different: it sets buds early and flowers from spring into early summer. Prune this one only after flowering-otherwise you’ll remove the buds in one go.

Butterfly bush (Buddleja): the harder you cut, the more it flowers

The butterfly bush, also known as Buddleja, tolerates an extremely strong March prune. Without pruning it becomes leggy and woody, producing plenty of growth but fewer flowers.

Large butterfly bush varieties can be cut back in March to 30–50 centimetres, while dwarf varieties can be reduced to around 15 centimetres.

Make cuts just above small buds or side shoots. These points drive the fresh, flower-bearing canes that develop in spring.

Climbers and shrubs: keep vigorous growers under control

Ivy: set firm limits each year

Ivy grows for much of the year-more slowly in autumn and winter, but still steadily. March is a good time to bring it back into bounds:

• cut off any loose, trailing stems,
• remove growth heading into gutters, timber cladding or mortar joints,
• shorten ground runners-ivy can creep well over 1 metre per year.

Regular pruning helps prevent damage to buildings and keeps the coverage neatly contained.

St John’s wort: cut back for a dense, bushy shape

Shrubby ornamental St John’s wort (yellow-flowering forms) can grow quickly and thickly, but without pruning it often becomes bare in the centre. Cutting it back to around 20 centimetres above the ground in March encourages compact, fresh regrowth.

Mediterranean container favourites: olive tree and oleander

Olive tree: shape and thin in March

Olive trees are common in front gardens and patio containers, yet they’re often pruned too timidly. March is when you establish and refine the framework:

• remove dead branches and any growth pointing inwards,
• thin the crown slightly so light reaches the interior,
• shorten overly long shoots until the silhouette looks balanced.

Olives reshoot reliably. Being a little braver with the cuts usually leads to a cleaner outline and sturdier, healthier branching.

Oleander: reduce strongly, but handle safely

Oleander is tougher than many people expect and can cope with having up to half the length of its shoots removed in March. Cut out frost damage, brown tips, and thin or weak shoots completely.

Important: oleander is poisonous in all parts-wear gloves when pruning, and keep sap well away from children and pets.

After pruning, place the pot somewhere bright and warm and water sufficiently. A sunny position and consistent watering support strong new growth and generous flowering.

Practical rules for clean, safe cuts

To make sure your March pruning doesn’t shock plants unnecessarily, stick to a few fundamentals:

• Use sharp tools: blunt blades crush stems, and damaged tissue is more likely to rot.
• Keep blades clean: disinfect quickly before pruning, especially after working on diseased plants.
• Avoid hard frosts: aim for dry, frost-free days.
• Cut correctly: make a slight angled cut a few millimetres above a bud.
• Remove dead and diseased wood first: take out dead, damaged or fungus-affected growth completely.

It’s also wise to think beyond the cut itself. Before you start, check plants for early nesting activity and avoid disturbing any birds that may already be taking shelter in dense shrubs or climbers. Once pruning is finished, clear away clippings promptly-especially thorny rose stems and any diseased material-to reduce pests and fungal carry-over.

Finally, a bit of aftercare helps plants make the most of their fresh start. A light mulch (kept clear of stems), steady watering in dry spells, and feeding where appropriate can support strong spring regrowth. Many gardeners also find a simple seasonal plan helpful: prune the March-friendly species listed here now, then tackle shrubs that flower on old wood in summer, so the garden stays tidy without constant guesswork.

Do the March jobs properly and the difference is unmistakable by summer: denser screens, more generous roses, fuller hydrangea heads, and Mediterranean container plants that don’t merely survive-they look their best all season.