I saw something 20+ years ago about a much faster way to grow these, since they are so slow growing. It involved grafting, but I still didn't understand how a grafted cactus could really grow any faster by grafting. I understand it is a time saver for propagating new cuts and stuff, but I didn't understand the concept behind it. In my neck of the woods, I last saw these nearly 45 years ago. Peruvian Torch and San Pedro were much fastr and much easier to locate and grow. Williamsi not so fast.