Premier Pro-Mix HP 3.8 cuft Compressed Bale with Mycorrhizae Plus Biofungicide. It is a high perlite content mix that provides a great growing environment to growers looking for a significant drainage capacity, increased air porosity, and lower water retention. The added benefit of fibrous peat moss and coarse perlite makes this formulation ideal for growers who require a product adapted to their needs for watering flexibility and crop seasonality. Biofungicide suppresses insects and protects the plant from disease. It is VeriFlora certified.