Diatomic Humus builds top soil. It replenishes deficient and non-performing plants with natural peat humate compounds and soil microflora that they need to thrive! It goes through a room-temperature extraction process which preserve the vitality of the microflora and TONS of humic substances which have significant impact on nutrient uptake and overall plant biomass. This dark liquid is teeming with life. Let it go to work for you on your plants' EVERYTHING!