Keep in mind when planting that intense purple is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.
Try to aim for a seed spacing of at least
1.27 feet (39.0 cm) and sow at a depth of around
0.06 inches (0.15 cm). Soil temperature should be kept higher than
21°C / 70°F to ensure good germination.
By our calculations, you should look at sowing intense purple about 28 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as intense purple is a tender plant.