Pro-Mix Bx Biofungicide + Mycorrhizae 3.8 cu ftPROMIX BX is the solution for growers seeking to benefit from perlite's as well as its drainage and aeration capabilities. Combined with high quality fibrous peat moss, this formulation is ideal for growers looking for a general purpose medium which creates a well balanced growing environment. Annuals Foliage plants Potted flowering plants Greenhouse vegetables Perennials Young plant propagation Vegetable transplants Hydroponic Medicinal Plants This