An autumn garden is not a shorter summer. It is a season with its own logic: light fades, growth slows to a crawl, and the plants that do well are the ones that were already established before the slowdown started. Sow the same lettuce four weeks apart in autumn and the second sowing may never catch up with the first.

That makes autumn a planning job rather than a planting job. Whether you call it the autumn garden or the fall garden, five decisions carry the whole season: when your first frost usually arrives, what you clear out of the summer beds, which sowing windows are still open, what you cover before the first cold night, and what you do with the ground that ends up empty. Work through them in that order and the beds keep producing into winter instead of going bare in September.

Step 1: Find Your First Frost Date

Every autumn date is counted backwards from the first frost, so that is the number to pin down before you buy a single packet of seed.

Climate zone	Typical first air frost	What it means for you
Atlantic, oceanic (Cfb): Ireland, western Britain, Brittany, the Dutch coast	Mid-November to December	A long, wet autumn. Rot and slugs cost you more crops than cold does
Lowland temperate (Cfb): the Rhine valley, northern France, Czech and Polish lowlands	Mid-October to early November	Roughly six usable weeks after the equinox, then covers go on
Continental (Dfb): eastern Poland, Slovakia, inland uplands above 400 m	Late September to mid-October	Sowing has effectively finished. This is a protection and storage season
Highland and alpine (Dfb to Dfc): above roughly 700 m	Early to mid-September	Frost can arrive before the summer crops are finished
Mediterranean (Csa): coastal Spain, southern Italy, Provence	December, or no air frost at all	Autumn is the main growing season, not the end of one

These are typical windows rather than promises, and your own garden will sit a week or two either side of them. A south-facing wall, a slope that lets cold air drain away, or a city centre will all delay the first frost. A valley bottom, an open field, or an exposed plot will pull it forward. If you are not sure which band describes your garden, our European climate zones guide explains how to place yourself.

Write the date down somewhere you will see it again. Everything below refers back to it.

Step 2: Clear the Summer Beds, but Not All of Them

Autumn tidying has a reputation for being about neatness. It is really about disease and about what the soil does over winter.

Pull out and dispose of, rather than compost:

Tomato and potato foliage with any sign of blight
Courgette and cucumber leaves covered in mildew
Anything that collapsed and you never worked out why

Cut down, but leave the roots in the ground:

Beans and peas. The root nodules hold nitrogen, and pulling them up wastes it
Sweetcorn and other bulky stems, chopped small for the compost heap

Leave alone entirely:

Crops still cropping. A struggling courgette plant is not costing you anything
Seed heads and hollow stems in the ornamental beds. They feed birds and shelter insects, and they look better in frost than bare soil does

The one rule that matters more than any of these: do not leave the soil bare. Bare ground over a wet European winter loses structure and nutrients, and comes back to you in spring as a compacted pan. Step 6 deals with what to put on it.

Step 3: Count Backwards to Your Last Sowing Date

Autumn sowing fails for one reason more than any other: people use the days-to-maturity number printed on the packet. That number was measured in spring and summer light.

Once daylight drops below roughly ten hours a day, growth almost stops. Plants stay alive and stay edible, but they stop adding size. In central Europe that point arrives in the first half of November and lasts until early February. Anything you want to eat before then has to reach full size before then.

So add two to four weeks to the packet figure for anything sown after mid-August, and use this:

Last sowing date = first frost date − (days to maturity + 14 to 28 days)

Crop	Days to maturity	Sow by	Survives down to
Radish	25–30	8 weeks before first frost	Light frost
Rocket	30–40	8–9 weeks before	About −7 °C
Spinach, 'Giant Winter'	40–50	8–10 weeks before	About −10 °C, more under cover
Turnip	45–60	9 weeks before	About −5 °C
Winter lettuce, 'Winter Density'	60–70	10 weeks before	About −5 °C with fleece
Lamb's lettuce, 'Cavallo'	60–70	10 weeks before	Hard frost, under a cloche
Kale, 'Nero di Toscana'	55–75 from transplant	Plant out 10–12 weeks before	About −15 °C, and the flavour improves

Two crops sit outside this table because they are not sown to be eaten this year. Garlic goes in during October and November and comes out the following July, and our guide to planting garlic in autumn covers the timing per climate. Overwintering broad beans such as 'Aquadulce Claudia' are sown from late October and crop several weeks earlier than a spring sowing.

Step 4: Fill Gaps the Day They Open

In autumn a bed that sits empty for a fortnight has lost a fortnight it cannot make up. Two habits fix that.

Sow into modules or small pots a couple of weeks before you expect a gap, then transplant the moment the summer crop comes out. Lettuce, spinach, chard and kale all move happily. Direct sowing is fine for radish and rocket, which are quick enough not to care.

Then put a cloche or a low tunnel over the last sowing of the year, from the day you sow it rather than when it turns cold. That alone buys two to three weeks of growing, which is often the difference between a crop and a tray of seedlings that never sized up. If you want the month-by-month version of what still goes in, our what to plant in October list breaks it down.

Step 5: Cover What Stays Out

Protection in autumn is not about surviving the coldest night of the winter. It is about holding warmth through October and November so plants keep growing, and about keeping rain off leaves that would otherwise rot.

Horticultural fleece, 17 to 30 g/m², gives you roughly 2 to 3 °C. Two layers give a little more but cut a lot more light, so use them only on the cold nights
A low tunnel or cloche adds a similar amount and, more usefully, keeps leaves dry
A cold frame shifts a bed about one climate band milder, which is enough to carry winter lettuce and lamb's lettuce right through
Mulch, 5 to 8 cm of straw or shredded leaves, over anything left in the ground to harvest later: leeks, parsnips, carrots, beetroot

Cover late, ventilate often

Putting fleece on in September rather than October gives you soft, sappy growth that then takes frost damage anyway. Wait until the forecast actually calls for it. And open covers on mild, still days: over a European winter far more plants are lost to rot under closed covers than to cold.

Step 6: Put the Empty Beds to Work

By late September you will have beds with nothing in them and no time to grow anything edible. They are not finished for the year.

Sow a green manure. Phacelia, field beans, winter rye and crimson clover all establish quickly, hold nutrients that would otherwise wash out, and feed the soil when you cut them down in spring. Sow by mid-September in continental gardens and into mid-October in Atlantic ones, because they need a few weeks of growth before the light goes. Skip mustard if brassicas are anywhere near that bed in your crop rotation, since it shares their diseases. Our green manure guide covers which species suits which gap.

Where there is no time even for that, spread 5 cm of compost or leaf mould and leave it on the surface. Worms will take it down by spring, and the covering does the same job of protecting soil structure.

This is also the right moment to write down what grew where. In March you will not remember, and the autumn garden is the only time of year when the whole plot is visible at once.

Step 7: Get the Harvest Indoors

The last piece is the crop you already have. Onions and garlic need to be fully dry before they go into store, squash need a couple of weeks of curing somewhere warm, and apples want to be checked over and sorted rather than tipped into a crate. Our guide to storing vegetables for winter covers the conditions each crop wants.

Do this before the first frost, not after it. A light frost on a pumpkin still sitting in the bed shortens its storage life by months.

What Usually Goes Wrong

Symptom	Likely cause	What to change next year
Seedlings germinated, then stopped	Sown too late, ran into short days	Sow two to four weeks earlier than the packet suggests
Plants rotted under fleece in mild weather	Covers left closed, no airflow	Ventilate on still days above about 8 °C
Nothing germinated in early September	Soil still above 25 °C, common for spinach and lettuce	Sow in modules in the shade, transplant when it cools
Beds compacted and grey by March	Left bare over winter	Green manure, or a compost mulch
Slugs took every autumn sowing	Damp, mild autumn plus dense cover	Wider spacing, clear hiding places, protect young plants

How Plantory Helps

The whole autumn garden hangs on one number that is different for every garden, and on counting backwards from it correctly. In Plantory you set your location once, get first-frost dates for your own climate rather than a generic calendar, see which sowing windows are still open today, and keep a record of what grew in each bed so next spring's rotation writes itself.

Plan Your Season