Graptopetalum 'Ellen' has pale green leaves and will turn powdery pink to purple when stressed. Although it can tolerate full sun, it requires some shade if the temperature goes over 90° F to prevent sun damage. Graptopetalum (leatherpetal) is a perennial succulent plants and native to Mexico and Arizona. They grow grow in a rosette. They are not frost hardy but in frost free regions, make excellent rockery plants.