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 Poulrem about 35 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Poulrem is a hardy plant.