Biobizz Pre-Mix is a unique powder fertilizer designed to restore the natural properties of depleted soils. The mixture of worm humus, volcanic rock flour, trace elements and beneficial fungi promotes dynamic growth, abundant flowering and maximum resistance to diseases and mold. Use: 3 - 5 l Pre-Mix per 100 l of substrate. Ideal as a fertilizer or recultivator. Mixing instructions for 1000 liters of substrate included.