Sow at a depth of approx.
0.5 inches (1.27 cm) and aim for a distance of at least
1.95 inches (5.0 cm) between Garden nasturtium plants.
By our calculations, you should look at sowing Whirlybird Cherry Rose about 14 days before your last frost date.
Whirlybird Cherry Rose is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.