Vegetables and fruit

Lettuce

LactucaAsteraceae
Also: Salad leaves, Cos lettuce, Romaine
AT A GLANCE
Part shade Water: lots H2down to 1 °C 15–30 cm tall · 20–30 cm wide In a pot: yes

Sow small amounts often rather than a whole packet at once.

Care

Light

Sun in spring and autumn; light shade in hot summers delays bolting.

Water

Medium-high — steady moisture; dry spells make it bitter and bolt.

Soil

Fertile, moisture-retentive soil.

Pruning

None. Pick outer leaves of loose-leaf types as needed, or cut whole heads.

Feeding

Dig in compost before sowing; rarely needs extra feed. In containers a light balanced feed every two to three weeks.

Propagation

Sow little and often, every two to three weeks, for a steady supply. Lettuce seed may not germinate above about 25°C, so in summer sow in the cool of the evening or in shade.

Month by month

Months change with the climate: in southern Italy tomatoes go out two months earlier than in England.

  1. MarchStart sowing under cover or direct under cloches. how ›
  2. MayProtect seedlings from slugs. how ›
  3. JulyWater regularly in hot weather and sow in light shade. how ›
  4. AugustSow hardy winter lettuce for autumn and winter picking under cover. how ›

Months based on climate: UK. Your choice stays on this device.

  1. MarchStart sowing under cover or direct under cloches. how ›
  2. MayProtect seedlings from slugs. how ›
  3. JulyWater regularly in hot weather and sow in light shade. how ›
  4. AugustSow hardy winter lettuce for autumn and winter picking under cover. how ›

Months based on climate: Northern Italy. Your choice stays on this device.

  1. FebruaryStart sowing under cover or direct under cloches. how ›
  2. AprilProtect seedlings from slugs. how ›
  3. JulyWater regularly in hot weather and sow in light shade. how ›
  4. AugustSow hardy winter lettuce for autumn and winter picking under cover. how ›

Months based on climate: Central Italy. Your choice stays on this device.

  1. FebruaryStart sowing under cover or direct under cloches. how ›
  2. AprilProtect seedlings from slugs. how ›
  3. JulyWater regularly in hot weather and sow in light shade. how ›
  4. AugustSow hardy winter lettuce for autumn and winter picking under cover. how ›

Months based on climate: Southern Italy and islands. Your choice stays on this device.

Common problems

Bolting

How to spot it. Plants shoot up and turn bitter.

What to do. Heat and drought; sow bolt-resistant varieties and keep watered.

Slugs and snailsfull sheet ›

How to spot it. Holes and slime trails.

What to do. The main pest; protect young plants.

Lettuce root aphid

How to spot it. Plants wilt; white waxy aphids on the roots.

What to do. Rotate and grow resistant varieties.

Questions

Lettuce: is it hardy?

H2: Tender. It survives down to 1 °C.

Can it grow in a pot?

Yes — ideal for pots, troughs and window boxes.

Lettuce: when do you prune it?

None.

When do you feed it?

Dig in compost before sowing; rarely needs extra feed. In containers a light balanced feed every two to three weeks.