Ensure a distance of
0.98 inches (2.5 cm) between seeds when sowing - look to sow at a depth of approximately
0.06 inches (0.15 cm).
By our calculations, you should look at sowing Duchess of Abercorn about 49 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Duchess of Abercorn is a hardy plant.