Unwins Runner Bean Guinness Record Seeds

For an earlier crop, sow individual seeds in 8cm pots of potting compost. Keep the pots on a sunny windowsill, in a propagator, or in a greenhouse, maintaining a minimum temperature of 12°C. Ensure the compost remains moist at all times, but not saturated.

Gradually accustom the young plants to outside conditions for 2-3 weeks before planting them out to their cropping positions from late May onwards, when the danger of frost has passed. Provide support with canes, placed in situ and tied together before sowing. These can be either in double rows, sloping inwards, with 15cm between canes, or in a 'wigwam' structure. Alternatively, plant in a container at least 75cm in diameter, such as a half-barrel. Plants will climb and twine naturally as they grow.

Sow direct, 5cm deep, into the required harvest position (next to a cane support, or in a large container, as described previously) once the danger of frost has passed.

Runner beans require plenty of water to produce a good crop. Water generously in dry spells. When plants are in full flower, an occasional mid-day spraying with a fine hose encourages flower set and bean production. Runner beans are generally disease and trouble-free. They thrive in a sunny position which is not exposed to cold winds.

Soil should be well-manured prior to planting. Runner bean seeds are sensitive to cold, wet soils and will not germinate in unfavourable conditions. Pick young for best flavour. Freeze surplus crops; slice and blanch for 2 minutes, then drain and cool before bagging for freezing.