Our Potting Supplies Trio is here for all your potting needs. Kit includes one medium bag of each of the following: Organic Potting Mix (100 oz), Organic Cacti Mix (124 oz), and porous Lava Rocks. Our all-natural mixes give your plants the air, moisture, and nutrition they need; while our lava rocks create a place for excess water to pool, away from plants' roots. Potting Mix ingredients: coir, compost, aged pine bark, rice hulls, earthworm castings Cacti mix ingredients: expanded shale, rice hulls, coir, sand, compost, soft-wood biochar, earthworm castings Lava rocks ingredients: just lava rocks