Brain Cactus Plant
Brain Cactus is such a unique mindblowing plant, it grows very slowly and doesn't require added fertilizer.
As with most succulents, the brain cactus is easy to take care of. Keep it in bright, direct sunlight and water it sparingly. Just be sure not to overwater it because if an excess amount of water gets into the folds, it'll rot.
Replacing your plant's potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!