If you soak the seeds in a glass of water overnight, before sowing them, they germinate a lot better!
Look to ensure a distance 1.95 inches (5.0 cm) between seeds when sowing - bury at a depth of at least 0.5 inches (1.27 cm) deep.By our calculations, you should look at sowing Tall 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 Mixed Colors is a hardy plant.