If you soak the seeds in a glass of water overnight, before sowing them, they germinate a lot better!
Sow 0.5 inches (1.27 cm) deep with a guideline distance of 1.95 inches (5.0 cm).By our calculations, you should look at sowing Tall Single Mixed Colors about 14 days before your last frost date.
As the seedlings develop, thin to achieve a final spacing of 25cm.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Tall Single Mixed Colors is a hardy plant.