I've been growing cactus for tortoise's for many years. I live in a cold winter area where not all cactus will survive our winters. I grow both spineless and types with long spines. My favorite is one type that has spines. I get more pads and fruit during the growing season than from the spineless per plant. I let the spineless grow new pads during the warm months and feed them off during winter.I took this picture today of some of the new growth pads showing no spines yet. They are about 8 to 9 inches in length and can reach over 12 inches before the spines start showing up especially if we have a wet spring and early summer. The first bloom opened today and it opens yellow but as the day goes on it turns orange using the phone it doesn't show the deeper orange color. It's really pretty when they start blooming in numbers. Especially when the fruits turns red.