How to grow lettuce — succession + cut-and-come-again

How to grow lettuce — succession + cut-and-come-again

Lettuce is the most-rewarding crop for an absolute beginner — fast (30-45 days), forgiving, and worth far more by weight in fresh salad than the bagged supermarket version. The catch: lettuce hates heat. Sow it in summer in a hot zone and it bolts (flowers, then turns bitter) in two weeks. This guide covers the succession-sowing rhythm that gives you fresh salad from April to November, with cultivar picks for each season and the cut-and-come-again technique that doubles your yield from a single sowing.

Track lettuce in Growli: Add your lettuce to the Growli app and we'll remind you to re-sow every 14 days so the salad bowl never runs out.

When to plant lettuce

Lettuce is a cool-season crop. Soil must be under 24°C/75°F for germination — hotter and the seed goes dormant. Approximate sowing windows:

For your specific window, check our frost-date calculator and USDA zones / UK hardiness pages.

The four types of lettuce

Pick the type before you pick a cultivar — care differs by type.

Loose-leaf

The easiest type, with open rosettes rather than tight heads. You harvest the outer leaves as needed and the centre keeps producing. Examples: Black Seeded Simpson, Oak Leaf, Red Sails, Lollo Rossa. The best starting point for beginners.

Butterhead (Bibb)

Soft, loose heads of buttery green leaves. Examples: Buttercrunch — an AAS winner from Cornell University (1963), still the standard heat-tolerant butterhead. Best for sandwiches and tender salad.

Romaine (cos)

Upright heads with crisp ribs. Examples: Jericho — bred in the Israeli desert for heat tolerance, slow to bolt, the best romaine for warm-summer gardens. Parris Island Cos is the traditional alternative.

Crisphead (iceberg)

The supermarket type. Hard to grow at home — slow, fussy about temperature, and lower yield per square foot than the other three. Skip in year one.

Soil and site

Lettuce wants:

• Cool conditions — 13-22°C / 55-72°F is ideal. Shade in summer extends the season.
• Partial sun OK — 4-6 hours of direct sun is enough. Afternoon shade helps in warm zones.
• Well-drained soil with organic matter. Lettuce roots are shallow and don't tolerate either drought or waterlogging.
• Slightly acidic to neutral pH — 6.0-7.0.

Container growers: 4 litres (1 US gallon) per plant minimum, with potting mix. Window-box lettuce works well — a 60 cm window box holds 4-5 loose-leaf plants. For a wider container plan, see our container vegetable gardening guide.

Cultivar quick-reference by season

Pick by season as well as by type:

Spring sowings (cool nights, warming days)

Any loose-leaf cultivar works. Black Seeded Simpson, Oak Leaf, and Lollo Rossa are reliable. For butterheads, plain Buttercrunch or Tom Thumb. For romaine, Parris Island Cos.

Summer sowings (heat-tolerant only)

Switch to bolt-resistant cultivars: Buttercrunch for butterhead, Jericho for romaine, Slobolt for loose-leaf, Salad Bowl (Red or Green) for leaf type. These tolerate temperatures 5-7°C / 10-15°F higher than standard cultivars before bolting.

Autumn sowings (cooling days, mild nights)

Switch back to flavour-led cultivars — Winter Density, Arctic King, and Rouge d'Hiver are old reliables bred for cool-weather sweetness. These also overwinter under cloches or fleece in mild UK winters.

How to sow — direct vs transplant

Direct-sow (recommended)

Lettuce seed is tiny. Sow a quarter inch deep on the surface, then dust with vermiculite or fine soil. Keep moist until germination (5-10 days). Thin once seedlings have 2 true leaves:

• Loose-leaf: thin to 6 inches apart.
• Butterhead: thin to 8-10 inches.
• Romaine: thin to 10-12 inches.

Transplant (for an early start)

Sow indoors in modules 4-5 weeks before transplant date. Lettuce transplants well — unlike cucumbers or squash. Set out hardened-off seedlings as soon as soil can be worked in spring.

For full bed planning see our vegetable garden layout guide and use the plant spacing calculator.

Succession sowing — the key technique

The single most important lettuce skill: sow a fresh batch every 14 days. A bed of one big sowing matures all at once — you eat lettuce for a week then have nothing. A 2-foot row sown every fortnight gives you fresh salad for 4-5 months.

Stop succession sowing 60 days before your first hot week (when daytime highs hit 27°C/80°F+). Beyond that, lettuce bolts before reaching harvest size.

For full timing logic, see our succession planting glossary.

Cut-and-come-again — the harvest technique

Most loose-leaf and butterhead cultivars regrow after the outer leaves are picked. The rule:

1. Wait until outer leaves are 4-6 inches.
2. Cut the outer 2-3 leaves at the base, leaving the central growth point untouched.
3. New leaves appear from the centre within 5-7 days.

A single plant gives 3-4 cuts over 6-8 weeks before it bolts. This effectively triples your yield from one sowing.

Watering and feeding

• Even moisture is everything. Dry spells produce bitter leaves and trigger bolting. Water deeply 2-3 times per week, more in heat.
• Mulch with straw or grass clippings to stabilise soil moisture. See our mulch primer.
• Light feeding at sowing (balanced 10-10-10) is enough. Heavy nitrogen produces lush leaves but speeds bolting in heat.
• Container plants need daily watering in summer.

Bolting — what causes it and how to slow it

Bolting is the stage where lettuce sends up a flower stalk and the leaves turn bitter. Triggers:

1. Heat — temperatures over 27°C/80°F for several days. The biggest cause.
2. Day length — long summer days trigger flowering in older plants.
3. Drought stress — even short dry spells accelerate bolting.
4. Age — even cool-climate lettuce bolts after 8-10 weeks.

How to slow it:

• Pick heat-tolerant cultivars in summer — Buttercrunch (AAS winner, the standard) or Jericho romaine (bred for the Israeli desert).
• Provide afternoon shade — a shade cloth panel or a tall companion crop (sunflowers, sweet corn).
• Mulch heavily and water consistently.
• Harvest young. Cut-and-come-again every few days keeps plants in a vegetative state for longer.

Companion planting

Lettuce is a friendly polyculture crop. See our companion planting for lettuce for the matrix. Useful pairings:

• Carrots — different root depths, no nutrient competition.
• Onions — pungency masks lettuce from aphid scent-finding.
• Radishes — interplant between rows; harvested before the lettuce closes canopy.
• Tall companions (sweet corn, tomatoes, sunflowers) — provide summer afternoon shade.

Pest watch

Three issues:

Slugs

The biggest UK lettuce pest, especially in spring on young plants. See our slugs and snails on lettuce page for organic iron-phosphate treatment, beer traps, and copper barriers.

Aphids

Greenfly cluster on new growth. See aphids on lettuce — a strong water spray clears most, or release ladybirds for biological control.

Fungus gnats / damping off

Affects seedlings in damp soil. See fungus gnats on seedlings and let the surface dry between waterings.

Storage and post-harvest

Lettuce loses sweetness fast once cut — supermarket lettuce is washed in chlorinated water to extend shelf life, which home-picked lettuce doesn't get. Best practice:

1. Harvest early morning when leaves are crisp and turgid.
2. Cool immediately — plunge in cold water for 30 seconds, then spin dry.
3. Store in a plastic bag or container with a paper towel to absorb excess moisture. Refrigerate.
4. Eat within 5 days for peak flavour; useable up to 10 days but progressively bitter.

For garden-to-table salads, harvest leaves 15-20 minutes before eating and rinse only.

When to harvest

Three approaches:

1. Whole-head harvest — cut at the base when the head reaches mature size (8-12 inches for romaine, 6-8 inches for butterhead). One-and-done.
2. Cut-and-come-again — cut outer leaves at 4-6 inches, let the centre regrow. Repeat 3-4 times.
3. Microgreens — harvest at 2-3 inches in 14-21 days. Resow immediately.

Harvest in the morning when leaves are crisp, refrigerate immediately, and eat within 5 days for peak flavour. Lettuce loses sweetness quickly once cut.

Related articles

• Types of lettuce — full cultivar gallery
• How to start a vegetable garden — wider beginner roadmap
• Vegetable garden layout — where lettuce fits
• Companion planting guide — partners for lettuce
• Starting seeds indoors — module-tray setup
• Easiest vegetables to grow — beginner ranking
• Frost-date calculator — your local windows
• USDA zones lookup — for timing
• UK hardiness ratings — for southern vs northern UK timing
• Plant spacing calculator — thinning distances

Reviewed and updated by the Growli editorial team. For questions, open Growli or email hello@getgrowli.app.