Sow
0.5 inches (1.27 cm) deep with a guideline distance of
1.88 feet (58.0 cm). Soil temperature should be kept higher than
21°C / 70°F to ensure good germination.
By our calculations, you should look at sowing Superstar Hybrid about 14 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Superstar Hybrid is a hardy plant.