Cucumber

Sow seeds on their edge to a depth of 1.5 cm in modules or small pots from mid-April. Use a heated propagator or warm windowsill at 21–24 °C for reliable germination. Do not sow earlier than this window, as seedlings grow quickly and suffer if root-bound.

Once seedlings have two true leaves, pot them on into larger pots from late April to early May. Handle carefully to avoid damaging the delicate roots, and use a rich potting compost. Keep them in a warm, bright spot to encourage strong growth.

Plant out into greenhouse beds or large containers from mid-May to late May. Space plants 45 cm apart and plant on a slight mound to keep the stem base dry. Provide vertical support like canes or strings for the vines to climb.

Train the main stem up its support and pinch out the growing tip when it reaches the top. Remove male flowers (those without a tiny fruit behind) to prevent bitter fruits, as greenhouse varieties are parthenocarpic and don't need pollination.

Water heavily from the base to keep the soil consistently moist from mid-May, avoiding the main stem and leaves to prevent rot and mildew. Once fruits start to form, feed with a high-potassium liquid fertiliser every 14 days to support fruiting.

Harvest fruits frequently while they are small and firm from early July to early October. Use a sharp knife to cut them from the vine, picking every few days to encourage more production. Regular harvesting prevents fruits becoming oversized and bitter.