Product Description Pro-Mix BX Biofungicide Mycorrhizae is a general purpose peat-based professional growing medium suitable for a wide variety of horticultural plants and transplanting applications. Features traditional peat-based growing medium with perlite and vermiculite and is pH-adjusted. Ideal for the production of vegetable transplants in large cell trays. Contains mycorrhizae mycorrhizal inoculum (glomus intraradices) and biofungicide (bacillus pumilus strain GHA-180).