Cactus lovers unite! These barrel cactus can grow to biblical proportions, I hope I can keep it under control. About 10 years ago I bought a tiny little barrel like button cactus, not exactly sure of the exact species, but its about a foot tall, 4" wide, just huge! It needs to be repotted, I need to go find some decent gloves first cause it's spiny!Hey, cactus twins! I think I have the same one, but my spines are red