Try to aim for a seed spacing of at least
7.8 inches (20.0 cm) and sow at a depth of around
1.17 inches (3.0 cm). Soil temperature should be kept higher than
21°C / 70°F to ensure good germination.
By our calculations, you should look at sowing Early Xtra-Sweet about 14 days after your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Early Xtra-Sweet is a tender plant.