Sow outdoors, from March to June, where they are to flower, 0.5cm deep, directly into finely-prepared, well-drained soil, which has already been watered. Seedlings usually appear in 14-21 days. Thin them to 15cm apart and water well until plants are established. For a continuous display, make sowings at two to three week intervals. Sowings made in curves, rather than straight lines, often create a more pleasing effect. Flowers from June to October.