Sow at a depth of approx.
0.25 inches (0.64 cm) and aim for a distance of at least
0.98 inches (2.5 cm) between Curly leaf parsley plants. For optimal germination, soil temperature should be a minimum of
10°C / 50°F.
By our calculations, you should look at sowing Curled about 35 days before your last frost date.
Curled is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.