A thorny, tropical succulent shrub with a biblical name and pretty flowers. Crown of Thorns can grow up to 2 feet tall indoors, sports thick, bright green leaves and lives happily with 3-4 hours of bright, direct sunlight. Depending on variety, Crown of Thorns can bloom in many different colors and prefers a cactus/succulent growing media. Toxic to humans and pets but the sap can be used to kill disease-carrying snails.