Propagation
Sow fresh seed during late winter in flats and prick out and pot up when large enough to handle, and grow on in a greenhouse. Plant out after the last frost in spring into a very well-prepared bed. See the note on short day and long day varieties in the plant overview.

Division and planting of offsets.

Botanic information
Leaf: The scented blue green hollow long linear leaves are terete in cross section and are up to 600 mm (2 ft) tall by 20 mm (¾ in) wide and are sheaved at the base.

Flower: The white to pinkish stellate flowers are up to 5 mm (⅛ in) wide with oblong-ovate perianth segments with a pale greenish or red mid-vein and exserted stamens with yellow anthers. They have a long green pedicle and sometimes are accompanied with bulbils. There are up to 500 flowers arranged in a terminal globular umbel with deciduous spathe bracts. It is held above the foliage on a thickened scape that is from 500 mm (18 in) to 1 m (3 ft) tall and appears in spring in the second year of growth and is pollinated by bees or insects.

Fruit: The small loculicidal capsule contains small black seeds that are very viable but the plant is commonly reproduced vegetatively to maintain true to type.