A proper organic substrate is quite possibly the most important and often most overlooked aspect of the entire cultivation process Compost: A well-balanced soil conditioner made from the finest organic uncontaminated raw materials. Bone Meal: Used as an organic fertiliser for plants – it’s a source of protein & phosphorous. Worm Castings: Providing a quick-release source of nitrogen for your plants while introducing healthy bacteria. Worm castings contain many micronutrients that are also very beneficial to the plant. Perlite: Sterile, with a neutral pH and contains many tiny, closed cells or bubbles. The surface of each particle is covered with tiny cavities which provide an extremely large surface area. These surfaces hold moisture and nutrients and make them available to plant roots.