Try to aim for a seed spacing of at least
11.7 inches (30.0 cm) and sow at a depth of around
1.95 inches (5.0 cm). Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Sun & Stars Hybrid about 10 days after your last frost date.
As Sun & Stars Hybrid is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.