Heres how you can quickly feed flowers, vegetables, trees, and shrubs while watering: Miracle-Gro Garden Feeder. Comes pre-filled with Miracle-Gro Water Soluble All Purpose Plant Food 24-8-16. Simply attach the feeder to any garden hose and squeeze the trigger. Your plants get the nutrients they need. You get the convenience of simple, one-handed feeding. Fast, easy, and mess-free. Plus, its refillable, so it works with other Miracle-Gro Water Soluble Plant Foods.