Premier, Pro Mix HP with Mycorrhizae Plus Biofungicide, 3.8 CUFT Compressed Bale, High Perlite Content, Provides A Great Growing Environment To Growers Looking For A Significant Drainage Capacity, Increased Air Porosity & Lower Water Retention, Added Benefit Of Fibrous Peat Moss & Coarse Perlite Makes This Formulation Ideal For Growers Who Require A ProductAdapted To Their Needs For Watering Flexibility & Crop Seasonality. Biofungicide suppresses insects and protects the plant from disease.