Pro Mix, 2.0 CUFT, Ultimate All Purpose Mix, Compressed Bale, Expands To 4.0 CUFT, Suitable For All Indoor & Outdoor Planting Applications, Contains A Specially Formulated Starter Fertilizer, Formulated For A Wide Range Of Plant Species, Components: Canadian Sphagnum Peat Moss, Peat Humus, Perlite, Limestone, Starter Fertilizer, Wetting Agent, & Mycorrhizae Premier Tech, A Natural Plant Stimulant Which Assists Plants With Nutrient & Water Uptake For Improved Plant Growth & Resistance To Stresses.