Why Autumn Is the Best Time to Plant a Bare-Root Tree

Bare-root trees are lifted from the nursery field while they are dormant, with no soil around their roots. That sounds brutal, but it is exactly how a tree wants to travel. Without a rootball to lug about, you can plant a decent-sized native whip or standard for a fraction of the cost of a container-grown one, and it will often establish faster because its roots are not coiled round the inside of a pot.

In the UK, bare-root season runs roughly from late October until early March, but the sweet spot is November. The soil is still holding summer warmth, the air is cooling, and rain is usually plentiful. Roots will settle in and even put on a little growth before the ground gets cold, so by the time spring arrives the tree is already at home and ready to push away. Plant in late spring instead and you spend the whole first summer watering something that is quietly sulking.

Choosing a Native Tree and Checking the Roots

Native species earn their place in a woodland garden. Oak, field maple, rowan, hazel, hawthorn, crab apple, wild cherry and silver birch all feed insects, birds and fungi in ways that many ornamentals simply do not. Match the tree to your ground: birch and rowan for light, acid soils; field maple, hawthorn and oak for heavy clay; alder and willow for damp, low-lying spots.

Before you buy, give the tree a once-over:

• Roots: fibrous, pliable and damp. Reject anything dry, brittle or with a thick taproot hacked off short.
• Stem: firm and clean, with no bark wounds, oozing patches or dieback at the tip.
• Buds: plump and dormant rather than shrivelled or already bursting.

If you cannot plant the same day, heel the tree in somewhere sheltered by laying it in a shallow trench and covering the roots with soil, or wrap the roots in damp hessian and keep it in a cool shed. Never let bare roots dry out in the wind.

Preparing a Square Hole

Dig a square hole, not a round one. A round hole with smooth sides can act like a plant pot sunk into the ground, encouraging roots to circle instead of striking out. A square hole with rough, vertical sides gives roots a corner to break through. For a small whip, dig roughly 60–90cm across and 30cm deep. Wider and shallower is always better than narrow and deep.

Keep topsoil and subsoil in separate heaps. Fork the base of the hole to break up any pan, then put the topsoil back in first when you fill. On heavy clay, work in a little well-rotted compost, but do not fill the hole with rich compost alone — the roots will not want to leave it.

Planting: Spreading the Roots Carefully

Look for the old soil mark on the trunk. It should sit level with the surrounding ground once you have finished. Too deep and the bark can rot; too shallow and the roots are exposed.

Make a small mound of soil in the centre of the hole, sit the tree on top, and spread the roots out evenly in every direction. Trim any damaged, kinked or circling roots with sharp secateurs. No root should curl back on itself.

Backfill in layers, working soil gently between the roots with your fingers rather than dumping it in one go. Firm as you go with the heel of your boot, but do not stamp hard — you want to close air pockets, not compact the soil to concrete.

Watering and Mulching to Settle It In

Water thoroughly after planting, even if the ground already feels damp. A slow, generous soak settles soil around the roots and removes the last of the air gaps. Then mulch with a 5–8cm ring of well-rotted bark or garden compost, keeping it a hand's width clear of the trunk to avoid rotting the bark.

Mulch does three jobs at once: it buffers the roots against frost, holds moisture through drying winds, and keeps grass and weeds from competing. Grasses are surprisingly fierce competitors for young trees, so a clear, mulched circle of at least 60cm is worth the effort.

Protecting Against Frost, Wind and Wildlife

On an exposed or windy site, stake a whip with a short stake driven in at an angle into the prevailing wind, and tie it with a soft tie in a figure-of-eight so the trunk can still flex. On a sheltered site, leave it unstaked — a tree that moves builds a stronger trunk.

• Rabbits and deer: fit a spiral guard or mesh sleeve around the trunk.
• Mice and voles: keep mulch clear of the trunk and check for gnawing in late winter.
• Frost lift: after a hard spell or a gale, press any heaved roots gently back and re-firm the soil.

Check your tree every few weeks through its first winter. Come spring, watch for bud burst, keep the ground clear, and water in any dry spell for the first two summers. Do that, and your native tree will repay you for decades — in blossom, in catkins, and in the quiet hum of a garden that is genuinely alive.