Sow
0.99 inches (2.54 cm) deep with a guideline distance of
2.97 inches (7.62 cm). Soil temperature should be kept higher than
4°C / 39°F to ensure good germination.
By our calculations, you should look at sowing Greenfeast about 35 days before your last frost date.
As Greenfeast is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.