What's the Difference Between Cacti and Succulents? Cotyledon "Narrow Leaf Pigs Ear" 5 Toxic Succulents for Pets You Should Avoid 20 philodendron types to add to your houseplant collection! When and How to Transplant Succulents Practicing the lovely shapes and colours of succulent plants. We have a small collection of them in the garden as well as cacti so I'll try a few others soon.