Chives (A. schoenoprasum) grow in grassy clumps from very small bulbs. The leaves have a mild onion flavour. Chinese or garlic chives (A. tuberosum) have bigger leaves that have a strong garlic taste. Both types grow well in small containers. To harvest, clip leaves close to the ground any time.
A pot of nursery-bought chives can be planted at any time, although it’s best to avoid the worst of summer and winter where those seasons are severe. Grow in average, well-drained soil or in pots. Keep the soil moist, especially if growing chives in pots. If clumps become overcrowded in pots or in the garden, lift them in autumn or spring, break them into smaller clumps and replant them.
These plants grow best in full sun but tolerate partial shade. In very hot, dry climates they may require a little shade.
Source:
Gardening: A Commonsense Guide (Murdoch Books)