PREMIER HORTICULTURE PRO-MIX 'BX' 3.8 CF COMPRESSED BALE Premier Horticulture Pro-Mix BX PREMIER PRO-MIX BX 3.8 CU FT BAIL 30/PAL PRO-MIX 'BX'/MYCORISE® PRO is a "general purpose" peat-based growing medium with vermiculite and perlite, used for the cultivation of a wide variety of plant species. This complete mix is lightweight, uniform and blended to the highest degree of consistency to ensure maximum plant performance. MYCORISE® PRO ensures stronger, healthier plants due to more developed root systems and better fertilizer uptake.