Try to aim for a seed spacing of at least
1.88 feet (58.0 cm) and sow at a depth of around
0.5 inches (1.27 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-Dew about 14 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Early-Dew is a hardy plant.