Ensure a distance of
3.96 feet (1.22 metres) between seeds when sowing - look to sow at a depth of approximately
0.25 inches (0.64 cm).
By our calculations, you should look at sowing Queen of the Prairies about 35 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Queen of the Prairies is a hardy plant.