Start seeds indoors six weeks before last frost date.
Ensure a distance of 2.60 feet (80.0 cm) between seeds when sowing - look to sow at a depth of approximately 0.78 inches (2.0 cm). Soil temperature should be kept higher than 12°C / 54°F to ensure good germination.By our calculations, you should look at sowing Rose about 42 days before your last frost date.
Transplant out when around 15cm (6 inches) high.
Plant to the first set of true leaves to promote strong root growth.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Rose is a tender plant.Seed was introduced by Dr. Grace Kaiser, a physician in New Holland, PA who was given the seed from one of her Amish patients in 1960.