Training Apple Trees as Espaliers Along a Garden Wall

Why Train an Apple as an Espalier?

An espalier is one of the most rewarding ways to grow apples in a small garden. By training a tree flat against a wall or fence, you turn a bare boundary into a productive, ornamental feature. The wall stores warmth during the day and releases it at night, which helps fruit ripen and protects blossoms from late frosts. Espaliers also make picking easy, improve air circulation, and allow you to grow several varieties in the space one ordinary tree would need.

The classic espalier has a central stem with pairs of horizontal branches, called tiers or arms, spaced at regular intervals. It suits spur-bearing apples best, because these produce fruit on short, stubby shoots along the branches. With patience and a sharp pair of secateurs, you can build a handsome wall of fruit in five to seven years.

Choosing the Right Tree and Wall

Start with a one-year-old maiden or a partially trained tree from a specialist nursery. For most garden walls, M26 rootstock is ideal: it is moderately vigorous, disease-resistant, and crops young. MM106 suits larger walls or poorer soil, while M9 is best for very small spaces and fertile ground. Choose a spur-bearing variety such as Discovery, Egremont Russet, James Grieve, Fiesta, or Ashmead's Kernel. Avoid tip-bearers like Worcester Pearmain, which crop at the ends of long shoots and dislike hard pruning.

A south- or west-facing wall is perfect. Allow 30–40 cm (12–16 in) between the tree and the wall for air and light. Fix horizontal wires at 35–45 cm (14–18 in) intervals, starting about 40 cm above soil level. The lowest wire becomes your first tier. Space tiers 45–60 cm (18–24 in) apart, and allow 3.5–4.5 m (11–15 ft) of width for three or four tiers.

Planting and the First Year's Training

Plant bare-root trees between November and March, when the soil is workable but not frozen. Dig a hole wide enough to spread the roots, and position the tree so the union — the knobbly join between rootstock and variety — sits just above soil level. Backfill, firm gently, and water well. Cut the maiden down to about 40 cm (16 in) above the first wire. This seems drastic, but it encourages strong new growth from below the cut.

During the first summer, select two strong shoots that grow outwards in opposite directions along the lowest wire. Remove all other shoots. Tie the chosen pair to bamboo canes fixed to the wire, using soft jute or plastic ties in a figure-of-eight so they do not strangle the stems. Keep a central leader growing upwards to form the next tier.

Tying In Shoots and Building Tiers

In the second year, extend the horizontal arms by tying in new growth at the tips. Train the central leader upwards, and when it reaches the next wire, select another pair of opposite shoots to form the second tier. Remove any shoots that break from the trunk between tiers. Repeat this process each year until you have the number of tiers you want.

Tying in is a gentle art. Use soft twine or purpose-made ties, and always leave a little slack for thickening. Check ties every few months and loosen or replace them as needed. Bamboo canes tied along the wires make an excellent temporary framework for guiding young shoots. Aim to keep the arms slightly above horizontal — never below, or the sap will not flow freely and the tips will weaken.

Summer Pruning for Fruit and Form

Summer pruning is the secret to a tidy espalier and a heavy crop. In late July to mid-August, shorten all current season's lateral shoots that are not needed for extension. Cut them back to three or four leaves above the basal cluster — the little ring of leaves at the base of the shoot. On mature trees, reduce these further to one or two leaves. This concentrates the tree's energy into forming fruiting spurs, lets light and air reach the fruit, and helps the wood ripen before winter.

Do not prune the central leader or the shoots you are training as new arms. Leave those to grow on. If your tree is very vigorous, you can repeat the summer pruning in early September, cutting any regrowth back to the same point. In winter, tidy up by removing dead, damaged, or crossing branches, and shorten the summer-pruned spurs to two or three buds if further spur formation is needed.

Ongoing Care and Common Pitfalls

Feed your espalier in early spring with a balanced fertiliser, and mulch with well-rotted compost, keeping it clear of the trunk. Thin fruitlets in June to one or two per cluster, about 10–15 cm (4–6 in) apart, to avoid biennial cropping and encourage larger apples. Water during dry spells, especially in the first three years.

• Woolly aphid: blast with water or scrub with a soft brush.
• Codling moth: hang pheromone traps in late May.
• Canker: prune out infected wood in dry weather, sterilising tools between cuts.

If an old espalier becomes congested, renovate it over two or three winters by removing one tier at a time and retying the rest. With regular summer pruning and a little patience, your wall will reward you with baskets of fruit and a living sculpture that improves with every season.