GAIA GREEN Rock Dust Blend contains a mix of rock dusts and humic acid, and is a source of natural minerals and trace elements that plants need to thrive. This product can be used on farms, home gardens, landscapes and turf, for a full range of plant types. A blend of glacial, basalt, and volcanic rock dust with humic acid. Contains a wide-range of trace elements to support both healthy plant growth and soil biological activity. Finely ground to improve nutrient availability.