Try to aim for a seed spacing of at least
11.7 inches (30.0 cm) and sow at a depth of around
0.47 inches (1.2 cm). For optimal germination, soil temperature should be a minimum of
16°C / 61°F.
By our calculations, you should look at sowing Calypso about 14 days after your last frost date.
Calypso is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.