Tomatoes are a favourite first crop for British gardeners, and a ripe fruit straight from the plant is nothing like a shop-bought one. Choose from tiny cherry tomatoes to large, richly flavoured beefsteaks.

When and how to sow

Tomatoes are tender and must not face frost. Sow under cover in module trays from February to April, then plant out after the last spring frost, from roughly March in the far south to mid or late May farther north. Harden plants off first, or grow them in a greenhouse or polytunnel for an earlier, more reliable crop.

Care

Give tomatoes the sunniest sheltered position, fertile soil and regular watering at the base. Support cordon types with canes or strings, and use a sturdy frame for bush varieties if needed. Good ventilation in a greenhouse helps keep foliage dry.

Common problems

Blossom end rot, tomato blight, slugs and whitefly under cover can all cause trouble. Keep watering even, space plants for airflow and remove affected leaves promptly. For persistent problems, ask the RHS or a local garden centre for advice.

Harvest

Pick fruits when fully coloured and slightly soft to the touch. Twist gently or cut the truss with clean secateurs. Before the first autumn frosts, gather mature green fruits to ripen indoors.

Growing Tomatoes: frequently asked questions

When should I sow tomatoes in the UK?

Tomatoes are tender and must not face frost.

What are common problems when growing tomatoes?

Blossom end rot, tomato blight, slugs and whitefly under cover can all cause trouble.

When is tomatoes ready to harvest?

Pick fruits when fully coloured and slightly soft to the touch.

General guidance for UK home gardens and allotments. Reference figures are typical values; your exact timing depends on your region, last-frost date and variety. Page updated 19 Sep 2026.