One of the most common questions from beginner gardeners in the UK is simply: what should I be doing right now? Gardening is intensely seasonal and the advice in most books assumes you already know when to do things. This calendar tells you exactly what to do, month by month, for a productive UK garden across an entire year.
Bookmark this page. Come back to it every month.
January — Plan and Prepare
January is the quietest month in the UK garden, and that’s exactly what it’s for. Use this time productively rather than forcing activity outdoors.
Do this month:
- Order seeds from catalogues now — popular varieties sell out by February. Real Seeds, Chiltern Seeds, and Suttons all have excellent UK-focused ranges
- Test old seeds for viability using the damp kitchen paper method
- Clean and sharpen tools — a sharp spade and hoe makes every task easier
- Turn your compost heap if not frozen
- On mild days, dig over empty beds and leave them rough — frost breaks up clods and improves soil structure
- Plant bare root hedging, trees, and roses while dormant
What not to do: Sow most vegetable seeds yet. The light levels in January are too low for healthy seedling growth in most of the UK, and you’ll end up with weak, leggy plants.
February — The Season Begins
The days are visibly lengthening by February and gardeners feel the itch to start. Some things genuinely can begin this month.
Do this month:
- Sow tomatoes, peppers, and aubergines on a warm windowsill (south-facing, 20°C minimum) — these need the longest growing season
- Plant onion sets and garlic (if you missed October planting, February is a second chance)
- Sow broad beans directly outside — they’re hardy and germinate in cold soil
- Chit seed potatoes: place them rose-end up in egg boxes in a cool, light, frost-free place to develop shoots before planting
- Prune autumn-fruiting raspberries down to ground level
- Feed overwintering plants with a slow-release fertiliser
March — Sowing Season Opens
March is the month the UK garden wakes up. Days are lengthening fast, soil is beginning to warm, and the range of things you can sow expands significantly.
Do this month:
- Sow lettuce, spinach, rocket, and radishes directly outside from mid-March in most of the UK — these are cold-tolerant
- Sow courgettes, squash, and cucumbers indoors on a warm windowsill
- Transplant tomato seedlings into individual 9cm pots if they’ve outgrown their initial pots
- Plant onion sets outside
- Divide established perennials — dig up clumps, split into sections, replant with fresh compost
- Apply a thick mulch of compost to beds before weeds emerge
💡 UK REGIONAL NOTE: The growing season in Scotland and northern England runs approximately 4–6 weeks behind the south. What’s safe to do outdoors in Cornwall in March may need to wait until April in Yorkshire or May in the Scottish Highlands. Always check local last frost dates.
April — The Busy Month
April is the most intensive month in the UK gardening year. Almost everything needs attention simultaneously.
Do this month:
- Harden off tomatoes and other indoor-sown plants by placing outside for increasingly long periods
- Sow French and runner beans indoors
- Plant potatoes outside once risk of hard frost has passed in your region
- Direct sow carrots, beetroot, and parsnips outside
- Sow sweet peas outside against their support
- Start feeding hungry plants — apply a balanced liquid feed to anything in containers
- Keep a close eye on slugs — their activity surges as soil warms in April
- Mow the lawn for the first time — set the blade high for the first cut
May — Planting Out Season
May is when the garden transforms from potential to reality. The last frost date passes (mid-May for most of England, later further north) and tender plants can finally go outside permanently.
Do this month:
- Plant out tomatoes, courgettes, cucumbers, and squash after the last frost
- Sow French and runner beans directly outside
- Plant out bedding plants and hanging baskets after mid-May
- Sow sweetcorn directly outside — sweetcorn needs warm soil to germinate reliably
- Pinch out the tips of broad beans when in full flower — this reduces blackfly infestation
- Begin regular feeding of container plants and tomatoes
- Watch the Met Office forecast carefully — a late frost can still occur in May in northern England
June — The Garden Peaks
June in a good UK summer is the most beautiful month in the garden. Long days, warming temperatures, and everything growing at speed.
Do this month:
- Remove sideshoots from cordon tomatoes weekly
- Harvest the scapes from hardneck garlic and use them in cooking
- Earth up potatoes if shoots are still visible
- Net strawberries and brassicas against birds
- Water containers daily — they dry out fast in June sunshine
- Sow a second batch of salad leaves to replace the spring sowing going to seed
- Support tall plants like delphiniums and dahlias with stakes and twine before they topple
July — Harvest Begins
July is the start of the main harvest period for most UK vegetable gardens.
Do this month:
- Harvest courgettes when they’re 15–20cm long — leaving them to grow into marrows stops the plant producing
- Harvest garlic when lower leaves have yellowed — cure in a warm, airy place
- Continue side-shooting and feeding tomatoes
- Harvest salad, peas, and early potatoes regularly
- Take semi-ripe cuttings of lavender, rosemary, and other shrubby herbs
- Water thoroughly during dry spells — an infrequent deep water is better than frequent shallow watering
August — Late Summer Abundance
August is the peak harvest month. The garden is producing faster than many families can eat.
Do this month:
- Harvest and process in bulk — freeze, preserve, or give away surplus
- Take cuttings of pelargoniums and fuchsias to overwinter indoors
- Cut back lavender by one third after flowering
- Prune rambling roses after flowering
- Sow Japanese onions and overwintering spinach for spring harvest
- Begin saving seeds from your best plants
- Start thinking about what worked this year and what to change next year
September — Winding Down Productively
September has a bittersweet quality in a UK garden — the days are shortening noticeably and there’s a first hint of autumn, but plenty of production continues.
Do this month:
- Cut off growing tips of cordon tomatoes to focus energy on ripening existing fruit
- Pick any tomatoes still green before frost and ripen indoors
- Plant spring bulbs — daffodils, tulips, and alliums planted in September and October flower the following spring
- Sow green manures on empty beds to protect soil over winter
- Clear and compost spent plants promptly to reduce disease overwintering
- Be extra vigilant about slugs — their activity peaks again in September
October — Garlic and Bulbs
Do this month:
- Plant garlic — this is the primary planting window
- Continue planting spring bulbs
- Lift and store dahlia tubers before first frost in northern regions
- Harvest and store squash and pumpkins — they need curing in a warm place for 2 weeks before storage
- Empty and store containers under cover to prevent frost cracking
- Apply a thick mulch of compost to all beds before the ground hardens
November — Putting the Garden to Bed
Do this month:
- Plant bare root roses, trees, and hedging — available from November and significantly cheaper than pot-grown plants
- Insulate outdoor pots with bubble wrap or hessian in exposed northern gardens
- Clean the greenhouse and cold frame ready for winter seed storage
- Final compost turning before winter
- Check stored bulbs and tubers for rot
December — Rest
The garden rests and so should you. December is for planning next year, browsing seed catalogues, and appreciating the structure plants bring to a winter garden — the skeletons of grasses, the berries of holly, the persistence of evergreens.
Do this month:
- Order seeds for next year before popular varieties sell out
- Clean and oil tools for winter storage
- Check stored garlic, onions, and root vegetables for any signs of rot — remove affected items before they spread
- Visit a garden open in winter — RHS gardens and many National Trust properties are worth seeing in December for their winter planting
💡 FINAL NOTE: Gardening is learned by doing, not by reading. Every year you garden, you’ll make mistakes and learn from them — a late frost catches you out, a crop fails, a new technique works better than expected. That accumulation of personal experience, specific to your garden, your climate, and your soil, is worth more than any calendar. Use this as a starting point, then adapt it to what you discover works in your particular corner of the UK.
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