Our Frass is an incredibly versatile NPK (2-2-3) fertilizer and natural insect repellent that is excellent for plant growth indoors or outdoors. All our products are organic and non-GMO. Our Frass is certified and registered by the CDFA (California Department of Food and Agriculture) as an Organic Input Material It is a natural source of nitrogen, phosphorus, and potassium for general plant growth. 100% Organic Mealworm Frass (Tenebrio Molitor) Nothing else Our 1lb Bag is great for starting. This portion of Frass will get you through 2-5 re-pottings (depending on size) or can help re-nutrient up to 10 plants. New pacagng coming soon!!