The Cal Mag Plus Iron EDDHA is a fast-release fertilizer in granules/pellets form that contains calcium, magnesium, and iron as its main ingredients. It is suitable for flowers, roses, and all-purpose plants. The mineral-based supplement weighs 2 pounds . It is manufactured in the United States and is shipped for free. 1/2 to 1 teaspoon per gallon 2.5 to 5 grams per gallon
eBay