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They are mostly fully hardy and will require a sunny position with well drained soil and will appreciate a summer baking. In cool wet areas bulbs may be lifted, when the leaves have died down, and stored in a dry place for replanting in autumn. They will need cold winters. You should plant in the late autumn in a sunny position.
Propagate from offsets or seed in autumn.
Pests, diseases or disorders
Aphids, Slugs. Bad soil conditions could affect the bulbs.