Sow the seed thinly 3mm (¼") deep direct into finely raked, moist, warm, weed-free soil where the plants are to flower. Germination usually takes 10-14 days. As the seedlings develop, thin them gradually to achieve a final spacing of 15cm (6"), removing any competing weeds. Remove dead flower heads as they appear. Poppies will grow readily in most garden soils in a sunny position.