The Harvest Company Vermiculite #3 is a natural horticultural soil amendment designed to improve moisture retention, aeration, and nutrient availability in potting mixes and growing media. By helping maintain the right balance of moisture and air around plant roots, vermiculite supports healthy root development, vigorous plant growth, and productive yields. It can be mixed with peat moss, mushroom compost, cactus soil, organic soil, bark, perlite, compost, coconut coir, worm castings, potting soil, and virtually any soil or soilless growing medium.The Harvest Company Vermiculite #3 naturally attracts and holds positively charged ions, including potassium, magnesium, calcium, and ammonium, helping make these essential elements available to plant roots. Vermiculite also naturally contains potassium and magnesium, providing a supplemental source of essential nutrients. Its excellent cation-exchange capacity (CEC) helps retain nutrients in the growing medium while its lightweight structure improves water retention, wettability, aeration, and pH stability in soilless mixes.Ideal for seed starting, container gardening, square-foot gardening, raised beds, greenhouse growing, potting mixes, and hydroponic drip systems, The Harvest Company Vermiculite #3 is formulated with successful growing in mind. Its durable particles provide excellent strength while creating a favorable growing environment for healthy roots and beneficial microorganisms.