Organic MechanicsÂ® Container Blend Potting Soil is OMRI listed, 100% organic, peat-free and earth-friendly. It contains a blend of premium ingredients designed to grow lush plants in container gardens. Use for potting up vegetables, herbs, tropicals, annuals, perennials or woody plants. Great for container sizes between 1 and 100 gallons. Formulated to hold moisture yet have excellent drainage, growers will notice having to water less as compared to peat-based mixes. Excellent biological properties from the OMRI listed compost and worm castings. Contains compost, coir, composted pine bark, rice hulls and worm castings.