Ensure a distance of
3.12 inches (8.0 cm) between seeds when sowing - look to sow at a depth of approximately
0.47 inches (1.2 cm). Soil temperature should be kept higher than
4°C / 39°F to ensure good germination.
By our calculations, you should look at sowing Negra about 45 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Negra is a hardy plant.