Sow
1.17 inches (3.0 cm) deep with a guideline distance of
2.28 feet (70.0 cm). Soil temperature should be kept higher than
15°C / 59°F to ensure good germination.
By our calculations, you should look at sowing Really Big about 10 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Really Big is a tender plant.