Big Daddy Onion 200 Seeds #0623 Item Upc#650348692094 110 days. Spanish-type yellow onion. 200 Seeds. This flavor-rich Spanish-type yellow onion is a real keeper. A good-sized crop will provide you with a year's worth of flavorful pleasure; they can be stored for up to 10 months. In addition to onion-loving chefs, Big Daddy (also called Cannon Ball) is a favorite with northern gardeners with long days. In April or early May, or as soon as the soil can be prepared in early spring, sow in a 2" wide band, about 2 seeds/in., 1/4- 1/2" deep, rows 12-18" apart. Thin to 1 1/2-2" apart for highest yields in fertile soil. Thin to 3-4" apart for larger onions and 4" apart for the "sweet mild" type.