The Grafted Astrophytum is commonly known as Living Rock cactus or Star Cactus, due to their appearance. It is a fully rooted, most likely grafted, cactus that you can plant in soil or regular potting mix. As most of us know, cacti live in the desert, but they only need light once they're rooted (and even then they like most light). Watering them isn't hard either; wait for it to dry out, don't water if it's cold outside, and mist them with water before the first frost.
These are 5-year-old and 6 inches plants at the time of delivery.