If you have never grown anything before, start here. Lettuce is fast, forgiving, and genuinely useful — a small patch can supply fresh salad for months. It germinates easily, grows in pots, beds, or even a window box, and teaches you the basic rhythms of sowing, thinning, and harvesting that every other vegetable builds on.
This guide is written for Central and Western Europe, with sowing months matched to our climate — not American hardiness zones.
| Care point | What lettuce needs |
|---|---|
| Sun | Full sun to partial shade; afternoon shade helps in summer |
| Water | Regular; keep soil moist but not soggy |
| Soil & pH | Any decent, moisture-holding soil with some compost; pH 6.0–7.0 |
| Sow indoors (Central Europe) | February to March for an early start (optional) |
| Sow/plant outdoors (Central Europe) | March to September, in small batches every 2–3 weeks |
| Spacing | 20–30 cm for heading types; 5–10 cm for cut-and-come-again leaves |
| Days to harvest | 30–45 days for baby leaves; 60–80 days for full heads |
| Difficulty | Very easy — the perfect first vegetable |
Step 1: Choose loose-leaf types for the easiest start
Lettuce comes in two broad habits. Loose-leaf (cut-and-come-again) types like Salad Bowl, Lollo Rosso, and oak leaf do not form a tight head — you pick outer leaves and the plant keeps producing. Heading types like butterhead (e.g. Tom Thumb) or romaine form a heart you harvest all at once.
For beginners, loose-leaf types are more forgiving and more productive per square metre: one sowing feeds you for weeks instead of giving a single harvest. Sow a mix of colours and leaf shapes — it looks beautiful and you will discover which you like eating.
Step 2: Sow little and often
The secret to endless salad is succession sowing: instead of one big sowing, sow a short row or a small pot every 2–3 weeks from March to September. Each sowing matures just as the last one finishes, so you never have twenty lettuces ready on the same day and then nothing.
Lettuce seed needs light to germinate, so sow very shallowly — barely cover with a dusting of compost, about 0.5 cm. Press the soil gently, water with a fine rose, and keep moist. Seedlings usually appear within 7–10 days in cool spring weather.
Step 3: Thin seedlings without mercy
This is the step beginners resist, and it matters enormously. A crowded row of seedlings grows into weak, leggy plants that bolt quickly. Thin ruthlessly: for cut-and-come-again leaves, leave 5–10 cm between plants; for hearts, 20–30 cm.
Do it in stages — thin to half spacing when seedlings are small, then to final spacing a week or two later. And do not waste the thinnings: baby lettuce thinnings are delicious in a sandwich.
Step 4: Keep it cool and moist
Lettuce is a cool-weather crop at heart. It grows best in spring and autumn; midsummer heat is its enemy (see troubleshooting). In hot spells, a spot with afternoon shade, regular watering, and a mulch of compost keeps plants happy much longer.
Water consistently — lettuce has shallow roots and dries out fast. In pots and window boxes, check daily in warm weather. A liquid feed every couple of weeks keeps leaf production vigorous, though lettuce is not as hungry as fruiting vegetables.
Step 5: Harvest the cut-and-come-again way
For loose-leaf types, start picking when leaves are big enough to matter — usually 10–15 cm. Take the outer leaves first, leaving the central growing point intact, and the plant will keep producing new leaves from the middle for weeks. A small patch picked this way can out-produce a row of headed lettuce.
For heading types, harvest the whole head by cutting at the base when it feels firm and full. Harvest in the morning when leaves are crisp, and get them into cold water quickly on hot days.
Step 6: Beat the slugs
Slugs love lettuce more than you do, and a single night's visit can shred a row of seedlings. Your defences: sow in pots or raised beds where possible, use copper tape or wool pellets around containers, go out with a torch after dark in peak season, and keep the area free of damp hiding places like boards and dense weeds.
Beer traps and nematodes (microscopic worms watered into the soil) both work well and are safe for an organic garden. Accept that you will lose some leaves — sow a little extra and share grudgingly.
Step 7: Extend the season into autumn and winter
Lettuce season does not have to end in September. Winter-hardy varieties like Winter Density, Arctic King, or lamb's lettuce (corn salad — not a true lettuce but eaten the same way) can be sown in late summer and autumn and will stand through winter in much of Western Europe, especially under a cloche or in a cold frame.
A simple plastic cloche or a cold frame over an autumn sowing can keep you in fresh leaves until Christmas and give the earliest spring harvest. It is one of the highest-reward small investments in the garden.
Troubleshooting: common lettuce problems
Bolting (sudden tall flower stalk, bitter leaves): Triggered by heat and long days — the plant thinks it is time to set seed. Sow bolt-resistant varieties for summer, give afternoon shade, keep water consistent, and harvest promptly. Once bolted, leaves turn bitter; compost the plant and sow again when it cools.
Seeds not germinating in summer: Lettuce seed goes dormant above about 25°C soil temperature. In heatwaves, sow in the evening, water well, and shade the seedbed with a board or cardboard until germination — or start seeds indoors in a cool room.
Bitter leaves: Usually heat, drought stress, or a plant left too long. Pick leaves young, water regularly, and grow summer crops in partial shade. Bitterness is the plant's stress signal.
Slugs and snails: See Step 6. Young seedlings are most vulnerable — protect them until they have several true leaves, after which plants tolerate some nibbling.
What to do this October
It is October — and lettuce is one of the few vegetables where October is still sowing season. Right now you can sow winter lettuce varieties, lamb's lettuce (corn salad), and claytonia (winter purslane) for harvests through winter and early spring, especially under a cloche or cold frame. Also: clear finished summer rows, compost the remains, and note which varieties bolted least — that is your shortlist for next spring's first sowing in March.
Frequently asked questions
Can I grow lettuce indoors on a windowsill?
Yes — baby leaf lettuce grows well in a shallow tray on a bright (not hot) windowsill. Sow densely, snip leaves with scissors when 8–10 cm tall, and you will get 2–3 cuts per sowing. A cool room works better than a warm one.
How do I stop lettuce going to seed so fast?
Choose bolt-resistant varieties for summer sowings, sow in partial shade during heat, water consistently, and harvest leaves young and often. Regular picking delays bolting.
Is red lettuce harder to grow?
No — red and green varieties grow identically. Red types are often slightly more slug-resistant and look stunning in the garden. Grow both.
Can I save seeds from my lettuce?
Yes, easily — let one plant bolt and flower, wait for the fluffy seed heads, and collect the seeds on a dry day. Lettuce self-pollinates, so saved seed grows true. One plant produces hundreds of seeds.
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