84-91 days. Black Dragon coleus seeds are a tidy and exotic grow ideal for many hot and humid gardens across the country. Black Dragon seeds mature into tolerant 12" tall dwarfed shrubs of rich velvety reds spreading 10-12" wide for an eye-catching ground cover along walkways, borders, fences, or in the flower bed. Coleus is native to the tropics of southeast Asia and perfectly suited to be grown indoors for year-round highlights. Black Dragon coleus is easy to grow from seed and guarantees a unique and cost-efficient ground cover for both residential and commercial properties. 1000 seeds.