Try to aim for a seed spacing of at least 7.8 inches
(20.0 cm) and sow at a depth of around 0.2 inches
(0.5 cm). For optimal germination, soil temperature should be a minimum of 10°C / 50°F
By our calculations, you should look at sowing Red Splash about 35 days before your last frost date.
Red Splash is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.