Designed to produce more blooms on your plants using a 10-30-20 formula. Jack's Blossom Booster contains chelated iron, which aids in keeping your leaves green! This supplemental water-soluble fertilizer can be used on a variety of flowering plants, like vegetables and indoor plants, in addition to roses. Best if applied every 7 to 14 days. For outdoor plants, mix 1 Tablespoon with 1 gallon of water. See label for instructions for indoor plants. Made in the USA and available in 2 sizes.