Coffee trees bloom with clusters of white flowers, usually signaling that the harvest season is approaching; the denser the petals, the more fruit can be harvested. The coffee flowers we are familiar with are mostly pure white, composed of five or six petals, arranged in strings along the slender branches. Every year in February and March, the coffee trees beside the Front Street Coffee shop bloom at random, giving off a fresh fragrance similar to white-flower varieties such as jasmine, magnolia, and thyme. But did you know that in extremely rare cases, coffee trees can actually produce pink flowers? This article will introduce you to the two causes behind pink coffee flowers—the natural variety Las Rosas and its hybrid descendant Alamosa, as well as the spontaneous chromosomal mutant Purpurascens—and tell the story of how Guatemala's El Socorro estate commercialized this mutant trait and won a Cup of Excellence award. [more…]