This will protect the succulent from freezing temperatures which could cause it to die. Crassula marginis rubra can be grown indoors. Keep them in a warm place. You can expect beautiful winter blooms from the cactus, provided it is near a window. Cactus can be grown in a pot, a plastic container, on the ground or in window boxes. Cover your container with clear plastic wrap to keep water in it. This is the best way for leaf cuttings to be propagated in water. The bigger the pot, the more moisture it will retain. Star Cactus should not be placed in larger containers than they need to.