Try to aim for a seed spacing of at least
5.85 inches (15.0 cm) and sow at a depth of around
0.98 inches (2.5 cm).
By our calculations, you should look at sowing Knuckle Purple Hull about 0 days after your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Knuckle Purple Hull is a tender plant.