Concrete planters are nontoxic to plants. They come in a variety of sizes and shapes including square, round, rectangle and urn-like. Concrete planters are heavy to move once filled and require frequent watering due to their porous nature. Coating the inside with sealer makes them less porous, reducing water requirements.
About this Author
Joyce Starr is a freelance writer from Florida and owns a landscaping company and garden center. She has published articles about camping in Florida, lawncare, gardening and writes for a local gardening newsletter. She shares her love and knowledge of the outdoors and nature through her writing.