Sow at a depth of approx.
3.9 inches (10.0 cm) and aim for a distance of at least
1.46 feet (45.0 cm) between Sweet Potato plants.
By our calculations, you should look at sowing Sweet Caroline Purple about 20 days after your last frost date.
Sweet Caroline Purple is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.