Glacial Rock Dust – great for vegetable gardens, potted plants, lawns, turf, flower beds, commercial field applications, urban garden plots, rooftop gardens, trees, shrubs, reforestation, and compost! Smaller particles maximize surface area for absorption by plants. Glacial rock dust helps to provide improved soil structure, moisture retention/drainage characteristics, cation exchange, and re-mineralization of depleted soils. This soil additive provides a natural source of trace minerals promoting healthy soils and increased plant/crop yields.