Dracaena Janet Craig display such amazing diversity in foliage that it is hard to realize they all belong to one genus. D. deremensis, rarely grown in the form of the basic species, comes in several popular varieties, most of which grow 2 to 5 feet tall. Two of the best are Janet Craig, which has strap like shiny dark green leaves 12 to 18 inches long and about 2 inches wide, and Warneckei, a variety particularly suited to dim light, which has 8 to 12 inch stiff sword-like gray-green leaves with white stripes.