Botanicare Rhizo Blast 500 ml (8/Cs)In Store Location: @E21 Botanicare Rhizo Blast Rhizo Blast is a powerful root developing tonic that boosts root growth. This proprietary formula contains a blend of seaweed, single celled algae and other mineral nutrients that help generate robust root growth while maintaining a strong rhizosphere. Rhizo Blast can be used with all grow mediums and is beneficial in hydroponic, soil and coco coir gardens.