Chill seeds for 24 hours before sowing. Needs dark to germinate. After germination, seedlings like cool temps (45-50F) & moist conditions.
Try to aim for a seed spacing of at least 6.04 inches (15.5 cm) and sow at a depth of around 0.23 inches (0.6 cm). Soil temperature should be kept higher than 18°C / 64°F to ensure good germination.Mulch.
As Delta pure deep orange is half hardy, ensure temperatures are mild enough to plant out (around 7°C / 45°F as a guideline) - wait until after your last frost date to be on the safe side.