At its best:
Jun, Jul, Aug
Add good drainage material to the base of the pots, such as polystyrene pieces, broken pots, or pebbles.
Fill the pots with multi-purpose compost and plant corms hairy side down, 15cm (6in) below the soil to prevent the stems from keeling over. Cover the corms with compost.
Label each pot, then water thoroughly and leave to drain. Place in a warm, bright spot, such as a window ledge or in the greenhouse.