Family: Alliaceae

Native to South America, this small genus of low-growing, bulbous plants comprises around ten species. Pretty, blue or white flowers, often sweetly scented, appear among the grassy leaves in spring. The foliage dies down in summer, reappearing in autumn, though lying on the ground in winter. When crushed, the leaves have an oniony smell.

Species

I. uniflorum, spring starflower, from Argentina, is the only species known in cultivation. It produces masses of star-shaped, blueish white flowers and looks wonderful planted in beds, borders, rockeries or containers. It grows to 20 cm (8 in), with slender, gray-green foliage.

Cultivation

These bulbs need a warm, sheltered position in full sun with well-drained, yet moisture-retentive soil containing humus. In climates with hard frosts, ensure the plants are mulched in winter. Plant in autumn, 8 cm (3 in) deep and 5 cm (2 in) apart. In climates with long periods of very hard frosts, grow in pots of gritty, soil-based potting compost in an unheated greenhouse or conservatory. Maximum light is needed. When dormant in summer, the compost should remain slightly moist. Propagate from seed sown in autumn or spring and germinated in a garden frame. Alternatively, divide clumps in summer.

Climate

Zone 8.