These are nice little fast growing barrel type cactus. They grow great if full sun all winter, fall and spring but in the hottest part of the summer when temperature is above 80 degrees F I keep them outside in the shade. They can take a little bit of cold weather 21 degrees F and snow too. I have these in my Tennessee and Arizona yard. In TN I have them in pots with well drained soil too much rain there. In AZ I have them planted in the yard. 1 barrel cactus will turn into 30 barrel cactus in only a few months after they have established good roots. They are called Easter Lilly cactus.