The best selling root stimulator Rhizotonic is now available in a 100% organic form. All-new Bio-Rhizotonic has been specifically developed to provide the same root boost as normal Rhizotonic but in an organic form - making it perfect for soil growers. Great for use on cuttings, stressed plants or when repotting, Bio-Rhizotonic is ideal with all Canna Soils and works best in conjunction with the rest of the Canna Bio range.