Start seeds indoors six weeks before last frost date.Aim to sow 0.78 inches (2.0 cm) deep and try to ensure a gap of at least 2.60 feet (80.0 cm). For optimal germination, soil temperature should be a minimum of 12°C / 54°F.
By our calculations, you should look at sowing Principe Borghese about 42 days before your last frost date.
Transplant out when around 15cm (6 inches) high.
Plant to first leaves to promote strong roots.Principe Borghese is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
Dates back to southern Italy to about the 1910’s.
Principe Di Borghese