Sow
0.49 inches (1.25 cm) deep with a guideline distance of
4.68 inches (12.0 cm). Soil temperature should be kept higher than
13°C / 55°F to ensure good germination.
By our calculations, you should look at sowing Full Sun about 21 days before your last frost date.
As Full Sun is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
The botanical epithet is from the Latin annuus meaning “annual”.