They are fully to frost hardy, and will require an open, sunny situation with well drained soil. If left undisturbed a clump can be formed. Plant at a depth of approximately 12cm.
Propagation is by offsets, by seed in autumn or by division of clumps (spring flowering varieties in late summer and summer flowering varieties in spring).
Pests, diseases or disorders
Prone to white rot, downy mildew, eelworm, rust and onion fly.