Ensure a distance of
0.5 inches (1.27 cm) between seeds when sowing - look to sow at a depth of approximately
0.12 inches (0.3 cm). Soil temperature should be kept higher than
10°C / 50°F to ensure good germination.
By our calculations, you should look at sowing Opal Purple Variegated about 20 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Opal Purple Variegated is a half hardy plant.