What to Plant Each Month: A UK Gardening Calendar

Ask an experienced gardener what separates a good year from a frustrating one, and timing will come up before technique. Sow tomatoes in January and they'll be leggy and struggling by the time the weather warms. Sow them in April and they race ahead. Britain's growing season is generous but narrow at both ends, and knowing what to do in each month removes most of the guesswork. This calendar covers what to sow, plant and harvest month by month, plus the seasonal jobs worth doing while you're out there.

The quick answer: how the UK year splits

Most of Britain sits in USDA zones 8 to 9, with the last frost typically falling between late March in the mildest southern counties and mid-May in northern and upland areas. The first autumn frost generally arrives from late October onwards.

Two dates govern nearly everything:

• Your last spring frost — sow tender crops indoors six to eight weeks before it, and plant them out afterwards.
• Your first autumn frost — anything tender must be harvested or protected before it.

Local conditions matter more than the calendar. A sheltered Cornish garden and an exposed Yorkshire one can be a month apart. If you're planting your very first beds, our beginner's guide to starting your first garden covers the groundwork first.

January

Sow indoors: Broad beans, sweet peas, onions from seed, chillies (with heat)
Plant: Bare-root trees, shrubs, roses and hedging while dormant
Harvest: Leeks, parsnips, kale, Brussels sprouts, winter cabbage

Order seeds early while the choice is best. Force rhubarb by covering crowns with a bucket. Check stored dahlia tubers for rot.

February

Sow indoors: Tomatoes (heated propagator only), aubergines, early lettuce
Sow outdoors under cover: Broad beans, spinach, early peas
Plant: Shallots, garlic if not already in, bare-root fruit
Harvest: Purple sprouting broccoli, forced rhubarb, winter salads

Prune apple and pear trees while dormant. Cut back deciduous grasses before new growth appears. Chit early potatoes on a cool, bright windowsill.

March

Sow indoors: Tomatoes, peppers, courgettes (late March), cucumbers, leeks
Sow outdoors: Carrots, parsnips, radish, rocket, spring onions, hardy annuals
Plant: First early potatoes, onion sets, summer-flowering bulbs
Harvest: Spring cabbage, leeks, sprouting broccoli

The soil is finally warming. If it's still cold and wet, wait — seeds sown into cold ground rot rather than germinate. Cover beds with fleece a fortnight beforehand to bring them on.

April

Sow indoors: French beans, runner beans, sweetcorn, pumpkins
Sow outdoors: Beetroot, chard, lettuce, peas, salad leaves, hardy herbs
Plant: Second early and maincrop potatoes, asparagus crowns
Harvest: Rhubarb, spring onions, early salads

Watch for late frosts. Keep fleece to hand and don't be tempted into planting tender crops outside yet, however mild the week feels.

May

Sow outdoors: French and runner beans, sweetcorn, courgettes, squash, carrots
Plant out: Tomatoes (after frost risk passes), bedding, dahlia tubers
Harvest: Asparagus, radishes, lettuce, early broad beans

May is the busiest month in a British garden. Earth up potatoes as shoots appear, stake tall perennials while they're short, and start regular watering of containers.

June

Sow outdoors: Successional salads, beetroot, carrots, French beans, biennials like foxgloves
Plant out: Leeks, brassicas, remaining tender crops
Harvest: Strawberries, broad beans, peas, new potatoes, courgettes

Feed containers fortnightly. Pinch out tomato side shoots on cordon varieties. Water in the early morning or evening to reduce evaporation.

July

Sow outdoors: Spring cabbage, winter salads, turnips, oriental leaves
Plant: Autumn-fruiting strawberry runners
Harvest: Courgettes, beans, currants, raspberries, garlic, early apples

Deadhead relentlessly — it's the single most effective way to extend flowering. Keep harvesting courgettes and beans; leave one to mature and the plant slows production.

August

Sow outdoors: Winter lettuce, spinach, land cress, spring cabbage
Plant: Autumn onion sets late in the month
Harvest: Tomatoes, sweetcorn, plums, blackberries, onions, maincrop potatoes

Take softwood cuttings of shrubs and pelargoniums. Prune summer-fruiting raspberries once picking finishes. Keep an eye on watering during holidays.

September

Sow outdoors: Hardy annuals, green manures, winter salad under cover
Plant: Spring bulbs (daffodils, crocus, alliums), new perennials, garlic late in month
Harvest: Apples, pears, runner beans, sweetcorn, squash

Soil is still warm and rainfall is returning, which makes September arguably the best planting month of the entire year for perennials and shrubs.

October

Sow: Broad beans and hardy peas for overwintering
Plant: Tulip bulbs, bare-root hedging, fruit bushes, garlic
Harvest: Pumpkins, apples, leeks, autumn raspberries

Lift and store dahlias in colder areas. Rake leaves into a bag or bin for leaf mould. Cut back collapsing perennials but leave seedheads for winter interest and wildlife.

November

Plant: Bare-root roses and trees, tulips (ideal now), rhubarb crowns
Harvest: Parsnips, kale, sprouts, celeriac

Insulate outdoor taps and drain hoses. Move vulnerable pots against a house wall. Spread compost over empty beds and let winter weather work it in — no digging required. Learn how to prepare your soil for the reasoning behind this.

December

Plant: Bare-root fruit and hedging in unfrozen ground
Harvest: Brussels sprouts, leeks, winter cabbage, parsnips

The quiet month. Clean, sharpen and oil tools, wash pots and seed trays, and plan next year's beds. Check tree ties and stakes after the first serious gales. Our guide to the essential tools for gardeners covers how to maintain them over winter.

Common mistakes to avoid

Sowing too early. February tomatoes on a cold windowsill become pale and spindly. Later sowings almost always overtake them.

Sowing everything at once. Thirty lettuces maturing in the same week helps nobody. Sow a short row every fortnight instead.

Ignoring regional variation. Northern and upland gardens run roughly two to four weeks behind the south. Adjust these dates to your own frost record.

Planting tender crops out too soon. A single unexpected frost in early May undoes months of work.

Forgetting autumn. September and October planting gives roots a genuine head start over anything you put in the following March.

Frequently asked questions

What's the single best month to plant perennials in the UK?
September. The soil retains summer warmth, autumn rain does the watering for you, and roots establish before winter dormancy.

How do I know my last frost date?
Local weather records are the most reliable guide, and neighbouring gardeners often know it instinctively. As a rough rule: late March to mid-April in southern coastal areas, late April inland, and into mid-May in northern and higher-altitude gardens.

Can I sow seeds directly outdoors instead of starting them indoors?
Many crops prefer it — carrots, parsnips, beetroot, radish and peas all resent root disturbance. Tender crops such as tomatoes and chillies need the extra weeks that indoor sowing provides.

What should I do in the garden during winter?
Plant bare-root stock, prune dormant fruit trees, mulch beds, maintain tools and plan. Winter work quietly determines how easy your spring turns out to be.

Working with the year, not against it

A gardening calendar isn't a rulebook so much as a rhythm. Some months ask a lot of you; others simply ask you to look. Keep a note of what you sowed and when, add what actually happened, and within two or three seasons you'll have a calendar tuned precisely to your own garden.

Browse the RYDA gardening range to find the seasonal essentials that keep each month's jobs straightforward.