The Thanksgiving cactus is also commonly called the holiday or crab cactus. It grows best in light shade. Full sunlight is beneficial in midwinter, but bright sun during the summer months can make plants look pale and yellow. Ideal growth occurs at temperatures between 70° and 80° F during its growing season from April to September. Do not let temperatures rise above 90° F once the flower buds are set in the fall. Continuous warm temperatures can cause flower buds to drop.
