Try to aim for a seed spacing of at least
5.85 inches (15.0 cm) and sow at a depth of around
0.49 inches (1.25 cm). Soil temperature should be kept higher than
5°C / 41°F to ensure good germination.
By our calculations, you should look at sowing Cosmo-Savoy about 53 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Cosmo-Savoy is a tender plant.