About this item Botanicare Pure Blend Grow Nutrient is a premium, one-part vegetative formula plant food Beneficial to fruits, flowers, vegetables, houseplants, shrubs, and cacti For best results use every watering and if you are using reverse osmosis water, it is recommended to use 1 tsp (5 ml) of Cal-Mag Plus per gallon of water 3.8 L Use for plants grown in coco, soil, soilless hydroponic applications, and container gardens Contains 3-2-4 NPK and is derived from fish meal, composted seabird guano, kelp, rock phosphate, potassium carbonate, magnesium carbonate, and calcium carbonate