Why Train a Fruit Tree as an Espalier?

An espalier is a fruit tree trained to grow flat against a wall or fence, its branches arranged in neat horizontal tiers. It is an old technique, perfected in the walled kitchen gardens of country houses, and it remains one of the most practical ways to grow fruit in a small space. A single tree can be squeezed into a border barely 40cm wide and still crop heavily year after year.

The benefits go well beyond saving space. A wall absorbs heat during the day and releases it slowly overnight, creating a warmer microclimate that can advance ripening by a fortnight or more. Because every branch is spread out and fully exposed to light, fruit colours evenly and develops better flavour. Picking is easy, pruning becomes straightforward once you know the rhythm, and the tree itself is a handsome feature in its own right.

Choosing the Right Tree, Wall and Rootstock

Apples and pears are the classic espalier subjects. Plums, cherries and damsons can be trained too, but they are less cooperative and often resent hard pruning, so start with an apple if this is your first attempt.

• Rootstock: for apples choose M9 for a compact espalier or M26 for something more vigorous. Pears do best on Quince A. These dwarfing rootstocks keep growth in check and push the tree towards fruiting. Avoid vigorous rootstocks — they will fight the training.
• Variety: choose a spur-bearing cultivar. 'Egremont Russet', 'Ashmead's Kernel', 'Kidd's Orange Red', 'James Grieve' and 'Sunset' all train well. Tip-bearers such as 'Worcester Pearmain' are frustrating, because most of the fruit forms at the ends of shoots that have to be cut away.
• Position: a south- or south-west-facing wall is ideal. East-facing is acceptable for apples; north-facing walls rarely ripen fruit properly.
• Pollination: check flowering groups and make sure a compatible partner is nearby, unless you have chosen a self-fertile variety.

Planting and the First Cut

Plant bare-root trees between November and March, ideally in November so the roots settle before winter. Set the trunk 30–40cm from the wall, so air can circulate and rain reaches the roots, and fix horizontal wires at 40cm intervals: the first at 40–45cm above soil level, then every 35–40cm. Use sturdy vine eyes and tensioned 12-gauge wire.

After planting, cut the young maiden whip back to a bud just below the first wire, around 40cm from the ground. It feels brutal, but it is the making of the espalier. In spring the buds below the cut will break: keep two strong shoots, one on each side, and train them along the first wire as they grow. Rub out any shoots that appear lower down the trunk.

Building the Tiers, Year by Year

The following winter, the central leader will have grown on. Cut it back again, this time to a bud about 35–40cm above the first tier. In summer, two more shoots emerge and are trained left and right along the second wire. Repeat each year until you have three or four tiers, which usually takes four or five years.

Train the arms while they are still supple, tying them with soft twine in a loose figure of eight so the stem is never pinched. Do not bend a shoot too sharply or it may snap; coax it into position in stages over a few weeks if necessary. Let the tips of the arms extend until they reach the length you want, then stop them.

Summer Pruning: The Secret of Heavy Crops

Once the framework is complete, your espalier needs two prunings a year, and the summer one matters most. In late July to mid-August, shorten the leafy shoots growing outwards from the horizontal arms to three or four leaves above their base. This redirects sap into fruit bud formation and lets light and air reach the spurs.

In winter, between December and February, cut those same shoots back further, to one or two buds. Over the years this concentrated pruning builds up short, knobbly fruiting spurs along the arms. Remove entirely any shoots growing straight out from the wall or downwards. Thin young fruitlets in late June if the crop is heavy, leaving one fruit every 10–15cm; the remaining fruit will be larger and the tree less exhausted.

Ongoing Care and Common Pitfalls

• Watering: newly planted espaliers need regular watering for their first two summers, especially against a wall where rain may not reach the roots.
• Feeding: mulch in spring with well-rotted manure or garden compost, keeping it clear of the trunk, and give a light general fertiliser in late winter.
• Pests: watch for aphids on young shoots in spring, and for codling moth and wasps as the fruit ripens.
• Winter pruning: avoid heavy cutting, which encourages leafy growth at the expense of fruit.
• Patience: an espalier spends its early years building structure rather than cropping. Expect a light crop by year three or four and full crops once the tiers are formed.