Mined from Scottish quarries, this remarkable volcanic rock dust contains two thirds of all non-synthetic minerals known to man, and is a natural method of adding essential trace elements to your soil. Rock Dust benefits include high yields, tastier fruit and vegetables and increased resistance to pests and drought. Beneficial to apply all year round except when the ground is frozen or in very windy conditions. Earthworm action will draw Rock Dust into the soil and help release minerals. Expect bumper crops and tastier fruit and vegetables. Completely natural and organic.