Direct sow coriander seed outdoors from April to July in light, well-drained, fertile soil, which has been raked to a fine tilth. Choose a position in full sun. Sow seed thinly at a depth of 1cm (1/2") in rows 30cm (12") apart. When large enough to handle, thin seedlings to 23cm (9") apart. Make regular sowings for a constant supply. Can also be sown in late summer for winter use, with cloche protection and full light for quality foliage production.
Coriander plants can quickly run to flower if not kept watered. When growing coriander for its leaves, remove the flowering stems as they occur to prolong quality leaf production.