This is an Old Man cactus originally from the Andes region of South America. The spines are not sharp and prickly, but soft and silky. This one is about three and half feet tall and grows a couple of inches a year. They can get twenty to thirty feet tall. We have had this cactus for many years and dug it up and replanted it when we moved. Fortunately, it seems to like the place it is now planted and is doing quite well.