SD Microbes 50/50 Garden MixSD Microbes 50 50 Garden Mix is a blended growing media made from our premium compost based potting mix and our compost amended base mix. This mix is designed for raised beds, garden boxes, containers, and general planting projects where a balanced, easy to use soil blend is desired. Made with a combination of coco coir, plant based compost, rice hulls, pumice, and compost amended soil materials, this blend offers a practical option for gardeners