Don't Treat Your Soil Like Dirt! Our Original Planting Mix is a blend of soil amendments such as aged forest products, sphagnum peat moss and earthworm castings. Use our Original Planting Mix for all your gardening projects. The aged forest products and peat moss in FoxFarm Original Planting Mix may make it more effective at holding moisture around the roots of plants. In turn, this may help you obtain glorious gardening results and save water at the same time. Sold in 1 Cu. Ft. Bag.