Sow at a depth of approx.
0.1 inches (0.25 cm) and aim for a distance of at least
0.2 inches (0.5 cm) between Hollyhock plants.
By our calculations, you should look at sowing Chater's Double Violet about 56 days before your last frost date.
Chater's Double Violet is very hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.