Volcanic rock dust will help you benefit from tastier crops and increase resistance to pest and drought. Rock dust is a completely natural product and is safe for organic vegetable gardening, Volcanic rock dust improves health, yield, vigour, flavour, and pest resistance for vegetables, flowers, fruit, grass, and trees. It is also very beneficial if added to the compost heap and wormeries. Expect healthier bigger crops with tastier fruit and vegetables. The rock dust is completely natural and organic.