If you soak the seeds in a glass of water overnight, before sowing them, they germinate a lot better!
Try to aim for a seed spacing of at least 1.95 inches (5.0 cm) and sow at a depth of around 0.5 inches (1.27 cm).By our calculations, you should look at sowing Glorious Gleam about 14 days before your last frost date.
As the seedlings develop, thin to achieve a final spacing of 25cm.
Glorious Gleam is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.