Sow at a depth of approx.
0.12 inches (0.3 cm) and aim for a distance of at least
0.98 inches (2.5 cm) between Mealy sage plants.
By our calculations, you should look at sowing Gruppenblau about 60 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Gruppenblau is a half hardy plant.