Miracle-Gro Garden Feeder is engineered to dispense just the right amount of plant food as you water your garden. By feeding with Miracle-Gro plant food as you water, you get bigger and more beautiful blooms, lush green foliage and lots of fresh homegrown vegetables. Fill the feeder jar with 1 lb of Miracle-Gro water soluble plant food. The jar comes already filled with your first feeding. The feeder dispenses 50 gallons of water in 12 to 15 minutes--that means a few scoops of plant food are used up in seconds (even if the water remains colored).