Sow
0.47 inches (1.2 cm) deep with a guideline distance of
3.12 inches (8.0 cm). Soil temperature should be kept higher than
4°C / 39°F to ensure good germination.
By our calculations, you should look at sowing Regency about 21 days before your last frost date.
As Regency is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
By our calculations, you should look at planting out Regency about 21 days before your last frost date.