Roses can be pigs. They just love to be fed. To get a prize winning pig, you need to feed it the good stuff. Roses are the same. To get great roses, you need great food. The best rose food available in
is Ada Perry’s Magic Formula. This food is only available at Walter Andersen Nurseries in Point Loma and San Diego Poway.
Ada Perry’s Magic Formula is made up of blood meal, gypsum, epsom salts, bone meal and other micronutrients. In others words, it is a terrific stew for making your roses happy. One twenty pound bag will feed about 30 roses. Each rose gets 2 cups in January and 2 cups in July and always water your roses thoroughly before feeding.
Here is Walter Andersen's info;
Walter Andersen Nurseries