Happy Frog Tomato and Vegetable Fertilizer provides your tomatoes and veggies with the extra energy they need to produce. You'll benefit from higher yields and improved nutritional value. Happy Frog Tomato and Vegetable contains high quality ingredients, including bat guano, kelp meal, alfalfa meal, fish meal and naturally occurring organic material that is formed when organic matter decomposes. This specialized fertilizer also contains calcium, which helps prevent blossom end rot, boosts stronger cell walls, and helps prevent disease. Begin applying as soon as you set out plants in spring. Use monthly through harvest time. 4 lb. bag.