Cereus forbesii, is native to Peru and for a long time was so rare that only wealthy plant enthusiasts who could afford to fund biologists had the pleasure of owning this unique and beautiful plant. When full-grown, the spiral cactus can reach heights of 6 to 13 feet tall and be 4 to 5 inches in diameter. Contrary to what people believe, not all cacti are slow growers; the spiral cactus is one of the fastest-growing cacti, so you’ll be rewarded quickly for giving this plant the proper care and attention. The plant has a blueish-green color and feels waxy to the touch. They are heavy bloomers, and the flowers they produce are show-stoppingly beautiful.