Sow at a depth of approx.
0.0 inches (0.0 cm) and aim for a distance of at least
1.95 inches (5.0 cm) between Trailing lobelia plants.
By our calculations, you should look at sowing Sapphire about 105 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Sapphire is a tender plant.