Our Potting Supplies Duo is all you need to pot your plants at home. Our all-natural, well-draining potting mix gives your plant roots the preferred balance of air, moisture, and nutrition they need; while our lava rocks create a place for excess water to pool, away from the roots. Includes one medium bag of Organic Potting Mix (100 oz) and one medium bag of Lava Rocks Potting Mix ingredients: coir, compost, aged pine bark, rice hulls, earthworm castings Lava rocks ingredients: just lava rocks