This premier potting soil containing peat moss, forest compost, coconut coir, feather meal, bat guano, marinebird fossilized guano, steamed bone meal, sulfate of potash, magnesia from langbenite, neem meal, earthworm castings, sea kelp (ascophyllum nodosum), humate ore (leonardite), oyster shell lime (ph adjuster). Does not require fertilization, depending on the plants & environment, for 30, 60 up to 90 days. It's the preferred companion to the Earth Juice line of fertilizers. The "Best" flowering planting mix on the market.