Sow at a depth of approx.
0.25 inches (0.64 cm) and aim for a distance of at least
3.96 feet (1.22 metres) between Rose plants.
By our calculations, you should look at sowing Spring Fever about 35 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Spring Fever is a hardy plant.