Start seed outdoors as soon as soil can be worked. Cover seed very lightly and keep the soil moist until all seedlings appear. For earlier flowers start seed indoors 4 weeks in advance of intended date for moving the plants to the garden. Germinates best at 21 C (70 F) usually in 7 – 14 days. Reduce temperature to near 12 C (55 F) after the seeds sprout for best results. These plants prefer full sun and a well drained soil, avoid soggy locations. They are susceptible to rotting at soil line if soil is kept too wet. Fertilize with 10-52-17 water soluble fertilizer to encourage strong rooting. Garden spacing 60 cm (24 in).