Why Autumn Tree Care Matters

As leaves turn and nights draw in, your trees are storing energy and preparing for dormancy. A few well-timed tasks now — before hard frost — can make the difference between a tree that sails through winter and one that struggles. The work is gentle but purposeful: clear fallen leaves, check stakes and ties, prune only when necessary, and mulch around the roots. Here's how to do each properly in a British garden.

Clear Fallen Leaves — and Make Leaf Mould

Fallen leaves are not just litter. In thick layers on a lawn, they block light and trap moisture, encouraging moss and fungal problems. Clear them regularly, especially after windy spells. But don't bin them — healthy leaves make superb leaf mould.

• On lawns: Rake lightly or use a leaf blower on low. Don't leave piles for more than a few days.
• On borders: A thin scattering is fine; thick layers smother small plants and encourage slugs.
• Diseased leaves: Black spot on roses, tar spot on maples, or horse chestnut leaf miner damage — clear thoroughly and put in council green waste, not compost.
• Leaf mould: Fill a bin bag or wire cage with damp leaves, pierce holes, and leave for a year or two. Oak, beech, and hornbeam are best.

Removing leaves from paths also reduces slipping hazards as wet leaves become treacherous.

Check Stakes and Ties Before the Gales

Young trees planted in the last three years rely on support. Autumn is the time to check, because winter winds test every fastening. A tight tie strangles the trunk; a loose one lets the tree rock and damage new roots.

• Ties: Snug but with a finger's width of space. Replace any cutting in. Use flexible, UV-resistant ties — not wire or string.
• Stakes: Push firmly to check for rot. Replace wobbly ones. After three years, consider removing the stake entirely.
• Guy ropes: Check anchors and tension. Loosen slightly before winter so the tree can move a little, encouraging stronger roots.
• Root ball: Firm the soil gently if it has lifted after frost or heavy rain.

Prune Only When Necessary

It's tempting to tidy with secateurs in autumn, but for most trees this is the wrong time. Wounds heal slowly and fungal spores are plentiful. Silver leaf, coral spot, and cankers are more likely to enter through autumn cuts. Prune in winter for growth, in summer for slowing down. Autumn is for necessary pruning only.

What counts as necessary?

• Dead, diseased, or damaged wood: Remove any time — it's a hazard and a source of infection.
• Crossing or rubbing branches: Take one out now. Cut back to a healthy side branch or the trunk.
• Safety: Any branch that could drop on a path, shed, or greenhouse should go.
• Avoid: Don't prune birches, maples, walnuts, or grape vines now — they bleed sap. Stone fruits (cherry, plum, peach) are prone to silver leaf; leave until early summer.

Use sharp, clean tools. Wipe blades with methylated spirits between cuts if removing diseased wood. Cut just outside the branch collar — never leave a stub.

Mulch, Water, and Protect Before Winter

After clearing leaves and checking ties, mulch around the root zone. A generous layer insulates roots against freeze-thaw cycles, conserves moisture, and feeds the soil as it breaks down. In British gardens, where winter brings both waterlogging and sudden frosts, mulch is a quiet hero.

Use well-rotted manure, composted bark, or your own leaf mould. Spread 5–10 cm deep in a ring to the drip line — the outermost reach of the branches. Keep mulch clear of the trunk; piling it against bark traps moisture and invites rot. Leave a 10 cm gap.

Apply after the ground is damp but not frozen. If dry, water thoroughly first. Then spread and gently firm — no digging in, which damages shallow roots.

• Water evergreens: Young evergreens and newly planted trees lose moisture through leaves all winter. Water if we get a dry spell.
• Protect bark: Use spiral guards or mesh against rabbits and deer.
• Final check: Look for weeping wounds, shelf fungi, or small holes. Note deadwood you can't safely remove and call a qualified arboriculturist.

Tie up any loose tree ties before the first gale. These small tasks take an afternoon but give your trees the best start to spring — and your garden a little more shade and blossom for years to come.