Try to aim for a seed spacing of at least
11.9 inches (30.5 cm) and sow at a depth of around
0.25 inches (0.635 cm). For optimal germination, soil temperature should be a minimum of
18°C / 64°F.
By our calculations, you should look at sowing Colorado Mixture about 49 days before your last frost date.
Colorado Mixture is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.