-Gro Tropical Potting Mix, 6 qts. is specially formulated to meet the unique needs of tropical plants. This potting mix includes lava rock, which enhances drainage and adds porosity, giving the soil a distinct texture and appearance d to other mixes. It provides the stability required for larger tropical plants and is designed to be less prone to gnats, helping to keep your plants healthy. The included Micromax micronutrient package feeds your plants for up to six months, ensuring they receive essential nutrients for sustained growth and vitality. Model Number: