GAIA GREEN Basalt Rock Dust is mined from an ancient volcanic deposit in British Columbia, Canada. It 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. GAIA GREEN Basalt Rock Dust is approved for use in organic agriculture by Ecocert Canada. Basalt is a mineral-rich, volcanic rock high in magnesium, iron, calcium and silica. Gaia Green Basalt Rock Dust is mined from an ancient volcanic deposit in British Columbia, Canada. Finely ground rock dust to rapidly re-mineralize depleted soils and potting mixes. Contains a wide-range of trace elements to support both plant growth and soil biological activity.