Natures Soil & Compost Regenerator & tonic for worms. 100% freshly crushed, ancient, mineral-rich volcanic rock dust from Scotl&. MINERALS & TRACE ELEMENTS often referred to as the foundation of health, are the smallest of soils 5 components. They are in decline in our diets. Many NPK (nitrogen, phosphorous, potassium) fertilisers are known to damage the soils LIVING ORGANISMS, but plants need these LIVING ORGANISMS to release the soils MINERALS & TRACE ELEMENTS. Without MINERALS & TRACE ELEMENTS plants, like us, become weak. Plants are then given what can be toxic pesticides & herbicides to help them grow. volcanic rock dust contains a vast range of MINERALS & TRACE ELEMENTS in their natural form i.e. what LIVING ORGANISMS & plants need for good health. We can learn from volcanic soil. Soil close to geologically recent volcanic activity is often found to be very rich & productive.