Here is my little T. pachanoi that I picked up at Home Depot a little while back. San Pedro is the fastes growing cacti reaching upwards of 18inches a year. It's just my little house plant basically. I don't give it any special treatment just let it chill in front of the window so not ecatly the best grower you have ever seen. In full sun that lighter green that you see should turn a very dark coloration. I just wanted to toss up a quick pic for those that did not know what it looked like. Peace