Moving a conifer is one of those jobs that can go beautifully right or horribly wrong, and the difference usually comes down to preparation. Unlike a deciduous shrub that can sulk for a season and then bounce back, an evergreen carries its needles through winter and keeps losing moisture from them. If you lift it carelessly, its roots can no longer take up enough water to replace what the foliage loses, and the tree slowly turns brown from the inside out. The good news is that small conifers — roughly up to 1.5 metres tall — are very moveable if you work with the dormant season, take a generous root ball, and give the tree shade and water afterwards.

Timing Is Everything: Move While Dormant

The safest window for transplanting conifers in the UK is late autumn to early spring, roughly November to early March. The tree is dormant, the soil is usually workable, and the demand for water from the needles is lower. Aim for a mild, dry spell when the ground is neither frozen nor waterlogged. A frozen root ball will shatter, and a soggy one will fall apart in your hands. Avoid moving a conifer during a warm spring flush, when it is pushing new growth and needs every root it has.

If you garden on heavy clay, late autumn is often better than late winter, because the soil is still warm enough for roots to settle in before the worst of the cold. On light, sandy soils, early spring is fine as long as you water diligently. The key point is that the tree should be resting, not actively growing.

Prepare the New Planting Spot First

Never dig the new hole after you have lifted the tree. The roots must not be exposed to drying air while you faff about with a spade. Prepare the destination first, then lift.

• Dig the hole two to three times as wide as the root ball you expect, but no deeper than the root ball itself.
• Fork the base and sides to relieve compaction, especially on clay. If drainage is poor, mix in some grit or well-rotted organic matter with the existing soil.
• Do not add fertiliser. It burns new roots and encourages soft growth at the wrong time.
• Check drainage by filling the hole with water. If it still stands an hour later, plant slightly proud of the surrounding soil or improve the drainage before proceeding.

Position matters too. Most conifers prefer full sun, but a few tolerate light shade. Choose a spot sheltered from drying east and north winds if you can. A windy site will strip moisture from the needles faster than the damaged roots can replace it.

Lift With a Generous Root Ball

The single biggest mistake is lifting a conifer with too small a root ball. As a rule of thumb, allow a root ball diameter of about 30 centimetres for every 2.5 centimetres of trunk diameter, with a minimum of 45 to 60 centimetres for a small garden conifer. A tree up to 1.5 metres tall may need a root ball 60 to 75 centimetres across. Bigger is better, provided you can still move it safely.

Water the tree thoroughly the day before lifting. Then mark a circle around it and cut down with a sharp spade, slicing cleanly through roots rather than hacking. Work your way around, then undercut at an angle to free the base. Slide a piece of hessian or a tarpaulin underneath and lift the root ball onto it. Never lift a conifer by its trunk — you will break the fine roots that keep it alive. Keep the root ball wrapped and moist while you move it.

Replant at the Right Depth and Water In

Set the root ball in the prepared hole so that the top sits level with the surrounding soil. The root flare — where the trunk widens into the roots — must be visible, not buried. Backfill in layers, firming gently with your hands or the heel of your boot. Avoid compacting wet clay into a brick.

Water slowly and thoroughly to settle the soil around the roots. Then check for air pockets by pressing gently around the root ball. A second soaking a few hours later helps. Mulch with a 5 to 8 centimetre layer of bark or leaf mould, but keep it 10 centimetres clear of the trunk. Stake only if the tree is top-heavy or the site is exposed; otherwise let it sway slightly, which encourages stronger roots.

Shade and Aftercare for the First Year

Shading after replanting is not optional for evergreens. The needles continue to lose water even in winter, and a transplanted conifer cannot keep up. Erect a temporary screen of horticultural fleece or shade netting on the sunniest and windiest side for four to six weeks. This simple step prevents the classic post-transplant browning that makes gardeners think they have failed.

Water deeply once a week through the first growing season, and twice a week during hot or windy spells. Do not rely on rain — check the soil 10 centimetres down and water if it feels dry. Feed nothing for the first year. Some conifers, such as yew, thuja and juniper, move relatively easily. Pines and cedars resent root disturbance more, so give them extra care. If needles brown, be patient; new growth may still emerge from latent buds. With a large root ball, dormant timing, shade and steady moisture, your small conifer has every chance of settling in as if it had always been there.