Miracle-Gro Peat Free Premium Moisture Control Pots & Baskets Compost is part of the high-performing Miracle-Gro peat-free range. With its unique 3-part patented formulation, this peat-free compost caters for the needs of all mature plants in pots and hanging baskets and will feed for 3 months. This unique compost provides the optimum structure for roots to grow strong and controls water availability according to their needs.