Use in salads for a milder flavour, or use them in soups and casseroles. Due to their huge size the onions don’t store for long, so why not chop and freeze, perfect to add to any cooked dish without making your eyes water each time you use them.For exhibition in Dec-Jan sow thinly 6mm (¼in) deep into a tray of good quality compost and keep in a propagator at 15°C (59°F). For culinary use seeds can be sown direct outside in March-April into finely raked soil 13mm (½ in) deep, 30cm (12in) between rows. Or into modules and planted out after the last frosts have passed.Transplant into individual 7.5cm pots (3in) at the ‘crook’ stage (when the young seedling still has the tip bent over like a shepherd’s crook) and grow on at 12-13°C (54-55°F). Keep moist but not wet. Keep young plants in a cold frame or greenhouse, planting out in May after all risk of frost has passed.