The Begonia Boston Cherries and Chocolate, 'Begonia rex hybrids', a Great American Cities + Begonias, are grown for their colorful textured leaves. Very attractive! The Rex Begonias are kings of the Begonia World, that's why they are called Rex because that in Latin means king. Lower light and cooler temperatures will really bring out the color in Rex begonias leaves and high light will cause all colors to fade. The soil must be well drained.For zones 9-11, this plant can also be a perennial.