Black Gold 1 cu-ft. All-Purpose Potting Mix. This nutrient-rich blend of Canadian sphagnum peat moss, earthworm castings, forest humus, compost, and pumice provides moisture retention and excellent drainage for your house plants, patio containers, or hanging baskets. Specially formulated with Multicote, a controlled-release fertilizer, it feeds plants for up to 6 months. Now containing Resilience, this patented growing mix is enriched with silicon for stronger stems and improved root mass.