Aim to sow
0.23 inches (0.6 cm) deep and try to ensure a gap of at least
0.98 inches (2.5 cm).
By our calculations, you should look at sowing Frosted Queen Mix about 7 days after your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Frosted Queen Mix is a half hardy plant.