The Red Flame is a seedling of 'Ruby Red,' and relatively new, discovered in 1973 and available only since 1987. It is a large grower, offers the dark red coloring of the 'Star Ruby' and also is more cold hardy and easier to grow. Fruit ripen in winter and early spring (hot summer zones only!!) and holds very well on the tree much later, though internal color fades. They tend to be smaller in size than other grapefruits but usually seedless, and the trees are precocious and heavy bearing. The fruit hang more under the canopy of foliage and are a little better protected against freezing than some other cultivars. Can grow indoors in extreme winter areas. Shipped as a potted five gallon plant in its original soil and container.