Roots Organics Formula 707 Growing MixRoots Organics Formula 707 Growing Mix Formula 707 is a ready to use soil created for fast growing, heavy feeding plants. It was designed with greater water holding capacity, less perlite and pumice and a coco fiber and compost for a good backbone, but plenty of room for you to amend. Its base is peat moss, coco fiber, compost, perlite and pumice. The containing bag also doubles as a ready to use pot; Just poke holes in the bottom, cut off the top and