Organic Compost With Worm Castings Indoor / Outdoor - 16 Dry Quarts - FREE SHIPPING! Vigorous soil amendment made of 100% composted material - perfect for all of your gardening needs. Perfect for indoor or outdoor use, Organic Compost with Worm Castings can be blended into your favorite soil mix or applied topically to existing soils. Use Organic Compost with Worm Castings monthly for all your existing plants, indoors and outdoors, to nourish the soil with rich organic materials. When planting or transplanting, mix half or more Organic Compost with Worm Castings into your planting medium. For existing plantings, work a thin layer of GPN Compost with Worm Castings into the top 1-2 of your soil. Watering will allow the natural organic materials to 'leach' down into the soil. Includes GPN Organic Compost made to USDA's National Organic Program (NOP) standards for certified organic food production.