Why Prune in Winter?

An apple tree is far easier to read when it is bare. Between leaf fall and bud burst — broadly November to early March — the whole architecture is on show, and wounds made now callus over smartly as growth restarts in spring. Choose a dry, still day when the temperature is above freezing; cutting in hard frost shatters brittle wood and leaves the tree slower to seal its cuts. Late November to mid-February suits most UK gardens, stretching into early March in the north. Leave October alone while leaves are still falling, and save summer pruning for trained forms such as cordons and espaliers, which are handled quite differently.

Start with the Three Ds

Before you think about shape or fruit, deal with the obvious. Working in this order turns pruning into a series of small decisions rather than one intimidating haircut.

• Dead wood: brittle, greyish and hollow-sounding. It snaps rather than bends. Cut back to healthy wood, which shows a pale green-white rim.
• Diseased wood: sunken, cracked cankers, often orange-tinged, plus woolly aphid galls and mildewed tips. Cut well below the damage, into clean wood.
• Damaged branches: storm splits and stubs left by earlier careless cuts.

Wipe your blades with a household disinfectant between trees, and always after touching canker, so you do not carry trouble from one tree to the next.

Open the Centre for Air and Light

Apples crop best on wood that ripens in good light, and problems such as scab and canker are far less troublesome where air moves freely. Stand back and look for the classic faults.

• Branches crossing and rubbing, which open wounds for disease — remove the weaker of the two.
• Branches growing steeply inwards towards the middle of the tree.
• Congested laterals crowding the trunk, and weak, whippy shoots thinner than a pencil.
• Low branches sweeping the ground, which trap damp and make mowing awkward.

A mature apple wants a goblet shape: an open centre with five to eight well-spaced main limbs radiating outwards and slightly upwards. Take out no more than about a quarter of the canopy in one winter. Spreading the work over two or three seasons is far better than stunning an old tree into a thicket of water shoots.

Make Every Cut a Good One

Sharp tools and clean technique do more for tree health than any wound paint, which is no longer recommended for pruning cuts. Use bypass secateurs for anything up to finger thickness, loppers to about 3cm, and a pruning saw beyond that. Anvil secateurs crush stems and are best reserved for dead wood.

Finish the cut at the branch collar — the slight swelling where the branch meets its parent. Do not leave a long stub, which dies back and invites rot, and do not slice flush against the trunk, which removes the collar and the tree's natural healing tissue. For a heavy limb, make an undercut first, then a top cut a little further out, and finish neatly back at the collar so the bark does not tear as the branch falls. Angle the cut slightly so rainwater runs off rather than sitting on the wound.

Encouraging a Reliable Crop

Most garden apples — 'Discovery', 'Katy', 'Egremont Russet', 'Cox's Orange Pippin' — crop on short, knobbly spurs carried on two- to four-year-old wood. Shortening this year's growth concentrates the tree's energy into fruit buds rather than leaves. Where a healthy lateral has grown long and thin, cut it back to three or four buds; where the tree is already thick with spurs, thin them so the fruit has room to swell.

Then tip the leading shoots of the main framework branches by roughly a quarter to a third, cutting to an outward-facing bud so new growth continues away from the centre. On young trees, keep the trunk clear of branches for the first 45–60cm to establish a decent leg.

A few cultivars behave differently. 'Bramley's Seedling' carries much of its fruit at the tips of long shoots, and tip-bearers generally resent hard spur pruning — thin the shoots and shorten only where you need to control size. If you are unsure which sort you have, leave the long shoots alone for one winter and see where the fruit sets. And remember that many apples, including 'Cox' and 'Bramley', are poor self-pollinators: no amount of pruning will fix a lonely tree.

Tools, Cleanliness and Counting the Years

Keep a small sharpening stone in your pocket and touch up the blade often; a dull saw bruises bark and leaves a ragged cut. Clean and oil tools before they go away for the season. Burn what you remove, or put it out for council green waste — not on your own compost heap, where canker and scab spores can survive.

Young trees need a lighter hand: form the framework for the first four or five years, then ease off. A well-pruned apple settles into a rhythm, and an hour with saw and secateurs each winter will repay you every autumn for a decade or more.