Sow seed on surface of compost and germinate at min. 10 °C
When seeds are large enough to handle prick out and grow on at the same temperature.
Transplant once risk of frost has passed into a hole so that the crown is clear of the soil. Remove sideshoots as the bulbs swell in midsummer (you need to keep it well-watered). Towards the end of September, draw soil up around the bulbs. If you are leaving them in over winter, cover with fleece or straw to keep them cosy.
Lift the entire plant and trim off roots and leaves. If you have a heavy, wet soil, it will probably be safest to lift them all in September and store them in damp sand in a frost-free shed. Otherwise, cover with straw or fleece and lift whe required.