A high-quality substrate that provides the perfect basis for plants. Pro Soil mix contains perlite that has a high air-filled porosity and elevated drainage to take up all the nutrients. The high substrate stability and rewetting ability make sure that plants efficiently take up all the necessary nutrients. Pro Soil All Mix contains a mix of nitrogen, potassium, and phosphor. This in combination with the Organic Humus Fertilizer inside creates the perfect circumstances for plants.