Keep in mind when planting that Pincushion Blue is thought of as hardy, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea).
Try to ensure a gap of at least
7.8 inches (20.0 cm) when sowing to prevent overcrowding your seedlings.
By our calculations, you should look at sowing Pincushion Blue about 42 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Pincushion Blue is a hardy plant.