Start seeds indoors six weeks before last frost date.
Try to aim for a seed spacing of at least 2.60 feet (80.0 cm) and sow at a depth of around 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 Pruden's Purple about 42 days before your last frost date.
Transplant out when around 15cm (6 inches) high.
Plant to first set of leaves to promote strong roots.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Pruden's Purple is a tender plant.Dates to the 19th century.
Prudence Purple
Giant Purple