For container planting, fill a container up to three quarters full with multipurpose compost. Carefully remove the plant from its tray or pot and place in position. Fill the container back in with soil and gently firm down. Water in generously. Always keep the plants well watered.
For open planting, dig a hole with a trowel to the same size as the plant’s root ball and place the plant in position. Fill in the hole and gently firm down. Water immediately.
To plant out a corm, note that the top side of the tuber is concave, the under side is convex. Shallow plant the tuber, top side up, so only about an inch of soil covers it. For best results start off in a seed tray in compost; once it has got started it can be moved outside into the ground.