HYDROPONIC PLANT FOOD with CALCIUM (19%) Calcium Nitrate 15.5-0-0 GREENHOUSE/HYDROPONIC GRADE For use in all hydroponic and greenhouse applications. General Uses Dissolve: 1/2 teaspoon (approx. 3 grams) into 1 gal of water. 29 grams (1 oz) into 10 gals of water. Use every week, or as needed, as a root drench through the growth and bloom stages. Total Nitrogen (N) – 15.5% Total Calcium (Ca) 19% Available in 1 lb, 2 lb, 3 lb or 10 lb recloseable water resistant bag