Grown from seed collected in the wild in South Texas. Sustainably grown from only one wild collection in the wild, and growing these beautiful cacti since from first generation mother plants grown from original collection in 2007. Hardy to at least zone 8 and 7 degrees fahrenheit in pots! Can also be overwintered easily inside. Plants are in 3.25 inch pots now, but will be shipped bare root. Perfect spherical shape and prolific bloomer. Great native Texas cactus for a great price!