Supersoil Professional Indoor, Balcony and Hanging Basket Mix is an all-purpose potting mix used and recommended by FlowerPower's professional growing nursery. With wetting agents for extra water retention and a slow-release fertiliser that feeds plants as needed, this is the ideal growing medium for your indoor plants to ensure they get all the nutrients they need. It's also great for balcony containers and supports plants in hanging baskets, too.