FoxFarm Bush Doctor® Kangaroots® QuartBush Doctor Kangaroots is a liquid root drench formulation designed to enhance root efficiency in the rhizosphere. Kangaroots contains nutrients which are immediately available to plants. Kangaroots also contains soil microbes to support the root zone and help plants achieve enhanced nutrient uptake. Kangaroots supplies essential macro and micronutrients that can help plants thrive. For use in both hydroponic and soil applications. For best results,