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There is a moment in late October when the garden looks tired and the temptation to tidy it into submission becomes almost irresistible. Resist it. A wildlife-friendly garden is not an untidy one by accident — it is untidy by design, and autumn is when those small decisions pay off for the birds, insects and mammals that will spend the coming months in, under and around your plants. Put the secateurs down for a minute and let us look at what actually needs doing before winter.
Seed heads are the single most valuable thing you can leave in place this month. Teasel, sunflower, echinacea, rudbeckia, fennel, sedum and the ornamental grasses all hold food well into January, and the birds know it. Goldfinches will work over a stand of teasel for weeks; greenfinches and bullfinches will do the same with sunflower heads left on the stem. Once those heads are cut and binned, that food is gone.
There is a second payday in spring. Late-flowering plants such as asters and sedum also feed late bees, and a red admiral or comma butterfly will happily take nectar from them on a mild November day. Fallen fruit is worth leaving too — blackbirds, redwings and fieldfares will clear windfalls, though it is sensible to remove any that are visibly rotting with brown rot to avoid spreading problems.
The hollow stems themselves matter as much as the seeds. Many of our solitary bees, ladybirds, lacewings and small beetles overwinter inside them. If you must cut back, leave stubble 30–45cm tall rather than cutting to the ground, and stack the cut stems loosely in a corner instead of shredding or burning them.
Autumn soil is warm and damp — perfect for roots to establish before the cold sets in. Plant spring bulbs from September to November, setting each one at roughly two to three times its own depth. In heavy clay, go slightly shallower and add a handful of grit beneath each bulb if drainage is poor.
Plant in drifts of odd numbers rather than neat rows, and let the foliage die back completely — six weeks after flowering — before you mow. Bare-root hedging and small trees also go in now, between November and March. Hawthorn, blackthorn, hazel, wild cherry and field maple give you blossom for early pollinators, leaves for caterpillars and berries for thrushes. Mulch around them with leaf mould and leave the soil undisturbed.
Think of autumn clearing as editing rather than demolition. Cut back anything that is diseased, slimy or collapsed over a path. Leave the rest. If you want a compromise, cut half of each clump now and the other half in late February or March — you keep the structure and the seed, and you still get a tidy-ish border.
Annuals that self-seed freely, such as nigella, poppies and calendula, can be shaken where you want them and left to it. And do try to postpone the main cut-back until late winter, when the worst of the weather has passed and insects have finished using the stems.
Two safety notes that matter enormously. First, do not turn the compost heap between November and March — hedgehogs, slow-worms and toads use it — and always fork it over gently before you dig in. Second, never build a bonfire on top of a pile of old wood and leave it sitting for days. Rebuild it in a fresh spot on the day you light it, or move it first. A hibernating hedgehog will not move out of your way.
Hibernation is a gamble, and shelter is what stacks the odds. A loose log pile in a shady corner, a dry stone wall, a hedgehog house tucked under a hedge and a few rocks around the pond edge will all be used. Clean out nest boxes once breeding is over, then leave them up — blue tits and great tits readily roost in them on freezing nights.
Water is easily forgotten. Keep a shallow bird bath topped up with stones or a gentle ramp for easy access, clean it weekly with hot soapy water, and float a small ball on the surface during hard frosts to keep a drinking hole open. Once you start feeding, keep going consistently: sunflower hearts, nyjer, good-quality fat balls and the occasional scattering of mealworms will see most species through. If hedgehogs are still active in your area, offer meaty cat or kitten food and fresh water — never milk or bread.
Leave a patch of leaf litter in the borders rather than raking every last leaf onto the lawn. Blackbirds, wrens and dunnocks will rummage through it, moths will pupate in it, and hedgehogs will nest under it. Everything else can go into a wire bin to rot down into leaf mould, which is the finest mulch you will ever make for free.
Keep the pond as it is, sludge and all. Frogs and toads overwinter in the bottom mud, and newts tuck themselves under stones and plant pots at the margins — a thorough autumn clean-out does real harm. If you have a greenhouse or shed, leave a few crumpled pots and canes in a corner; they are surprisingly popular with overwintering insects.
Above all, do less and do it gently. The garden that looks slightly scruffy in November is the one that hums in April, and the birds, bees and hedgehogs that use it will repay you many times over.
Opal Glade shares practical, down-to-earth guidance on woodland gardening and british wildlife for readers across the UK.
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