Grotek – Black Pearl – Green Line – Biochar
– SOIL BUILDER –Black Pearl™ is more than just high-quality charcoal. It is ladened with high-grade ingredients like biochar, volcanic rock dust, low molecular weight humates, and kelp. The harmony between ingredients in the soil provide a dramatic boost to crops when added to any nutrient program.
Application Rate: 900ml mixes into 36L of growing media.