Choose an open, sunny position. Sow thinly direct into finely raked, moist, warm soil where the plants are to flower at a depth of 6mm (¼"). Germination takes 10-14 days. Thin seedlings in stages to 30cm (12") apart. Sow spring for summer flowering or September for early summer the next year. Alternatively, can be sown and grown in boxes before planting out late May/June.