Seed Starting Do's & Don'ts O'Toole's Garden Centers Tiny Terracotta Kits Complete Growing Set Glazed Planter with Coconut Pot Filter Modern Sprout Many people are surprised to learn that cactus and succulents benefit from fertilizer, especially when they are growing in containers. Since potted plants don't have access to the natural nutrients found Heather Baird makes edible terrariums that look too real to eat.