Leaf clearing is the autumn job people either do obsessively every weekend or never do at all, and both are wrong in the same way: they treat the whole garden as one decision. It isn't. Leaves on a lawn are a problem. The same leaves on a border are free mulch. Where they land decides what happens to them, and once you sort it that way the job gets a lot smaller.
Off the lawn — this is the one that matters
Grass keeps growing well into autumn, and it can't do that under a mat of wet leaves. No light gets through, moisture sits against the base of the plant, and by the time the leaves finally break down you're looking at yellow patches, moss where the grass gave up, and bare ground that needs reseeding in spring. It's the one bit of leaf clearing that's genuinely repairing damage rather than tidying.
The signal isn't a date on the calendar, it's coverage. A scatter of leaves does nothing. Once you can't see the grass through them, they need to come off. In a garden with mature trees that means going over it every week or so through the drop rather than waiting for the last leaf to fall and doing one enormous blitz — which is more work anyway, because a fortnight-old wet mat has already bonded itself to the lawn.
The quickest way is the mower. A rotary mower on a dry-ish day picks the leaves up and shreds them on the way into the box, and it takes a bit of grass with them, which makes better material for the heap than leaves alone. Wet leaves are a different story: they clog the deck and the mower just shunts them into rows. When they're sodden it's a rake or a blower, and no mower.
If you're already thinking about the last cut of the year, the two jobs go together — see when to stop mowing.
In the beds — leave them where they fell
This is the bit that saves the most time, and most people don't believe it until they've tried a season of it. Leaves on a border are exactly what a woodland floor does to itself. Worms drag them down over winter, and by spring most of them have gone into the soil. Raking them out and then buying mulch to put back is a job and an expense that cancel each other out. There's more on what mulch is doing down there in mulching beds in autumn.
Two exceptions worth walking round for:
Low evergreens and alpines. Anything small and permanently leafy will rot under a thick blanket. Lift the leaves off those and drop them somewhere else in the same bed.
Big leaves on small plants. Sycamore, plane and horse chestnut leaves are large enough to form a sealed sheet rather than a loose litter. Over a mature shrub border, fine. Over emerging bulbs or anything low, break the mat up.
Everything else can stay.
Paths and steps — do these before the rain, not after
The slip risk on a leafy path isn't really the leaves. It's the thin black film of algae that develops under them once they've sat damp for a week or two, and that film stays slippery long after the leaves have gone. Leaves left on light paving also stain it, and those marks are stubborn.
So paths are the one place where prompt beats thorough. A two-minute sweep while they're dry is worth an hour of scrubbing in December.
The pond, if there is one
A few leaves in a pond are not a problem. A season's worth is, because they sink, rot through the winter and pull the oxygen out of the water while they do it. Either net it over for the drop, or scoop the worst out with a net before they go down. If you're fishing them out, leave what you take on the bank overnight so anything living in it can crawl back.
What to do with the pile: make leaf mould
Leaves are the one garden waste that turns into something better than compost for the least effort, and burning them or bagging them for the council is throwing it away.
Leaf mould works differently from a compost heap, which is why the usual compost rules don't apply. A compost heap heats up because bacteria are working on soft green material. Leaves are mostly lignin — the tough stuff — and that's broken down by fungi rather than bacteria, slowly and cold. So a leaf pile never heats, doesn't need turning, doesn't need anything added to it, and can't really be got wrong. It just needs to stay damp and be left alone.
What it does need is patience. The RHS puts most leaves at about two years to break down properly, and that matches what I see. What varies is the species:
Oak, beech and hornbeam make the best leaf mould and need no help at all.
Sycamore, horse chestnut, sweet chestnut and walnut are thick-leaved and much slower. Run the mower over them first or they'll still be recognisable in two years.
Conifer needles take two to three years. Worth doing, but keep them in their own pile so they don't hold up everything else.
Holly, laurel and aucuba are too leathery for a leaf pile. Shred those and put them on the compost heap instead, where they'll rot faster.
The method is as simple as it sounds. A wire cage in a shady corner is ideal. Failing that, fill a bin bag, damp the leaves down if they went in dry, stab a few holes in the bag with a fork, tie the top loosely and stand it out of the way. After a year it's a rough mulch worth spreading on beds. After two it's fine, dark and crumbly, and good enough to mix into potting compost.
Before you move a pile that's been standing — check it
A hedgehog's winter nest is built out of dry leaves. Not near them, out of them: a compact dome roughly 30 to 60cm across with walls up to 10cm thick, tucked under a hedge, behind a shed or inside exactly the heap you left at the back of the garden in October.
The timing is later than most people assume. The British Hedgehog Preservation Society puts the start of hibernation in Britain at usually November or December, sometimes as late as January, with hedgehogs coming out again from about mid-March to early April. So an early-autumn heap is generally clear, and the same heap in December may well not be.
Worth being straight about the status of this. Unlike the nesting-bird rules, which are genuine law and can bite — that's covered in hedge cutting and nesting birds — hedgehog nests carry no legal protection at all. Hedgehogs sit on Schedule 6 of the Wildlife and Countryside Act 1981, which restricts certain methods of killing and trapping them and says nothing about their nests. So this isn't a rule anyone can enforce. It's just what you do.
In practice it costs nothing: move an old pile by hand or with a fork lifting from the outside in, rather than driving a fork straight down through the middle of it. If you find a nest, put the material back and leave that corner until spring.
The same applies to bonfires, more urgently. A bonfire heap that has stood for a few days is a hedgehog nest with kindling on top. Move the whole thing to a fresh spot immediately before lighting it, and light it from one side rather than the middle.
One more autumn thing, since it comes up: a hedgehog out and about in daylight in autumn is not a nice sight, it's a hedgehog in trouble — usually a late-born juvenile that won't make its weight before winter. Box it somewhere warm and ring a local rescue the same day.
And on burning leaves generally
There's no law banning garden bonfires and none setting the hours you can have one. What the law cares about is the effect: persistent smoke that interferes with a neighbour's use of their property can be a statutory nuisance under the Environmental Protection Act 1990, and the council can serve a notice over it. Dark smoke is a separate offence under the Clean Air Act 1993, which is really about what's on the fire — plastic, painted timber and rubber, none of which should be there anyway.
But the horticultural answer is simpler than the legal one. Leaves are the single best free soil improver a garden produces, and they cost nothing but time to keep. Burning them is the one option that leaves you with less than you started with.
The order I work in
On a full leaf clear-up, this is the sequence, and it's roughly fastest-payback first:
Paths, steps and drains — safety, and it's quick.
The lawn — mower if it's dry enough, rake if it isn't.
Gutters and the base of hedges — where blown leaves collect and stay wet.
Beds — only the low planting and the sealed mats. The rest stays.
The heap — everything gathered goes into a cage or bags, not the fire.
Half of that is done in the first twenty minutes, which is worth knowing when the whole garden looks buried.