Make sure your fruit and nut trees are lush and abundant all season long with Ross® Root Feeder Refills for Fruit & Nut. Use Refills in your Ross Root Feeder to get the perfect balance of nutrients directly to plants roots - while watering too. With other fertilizers, you dont know how much of the fertilizer is actually reaching your plant. These refills are a special high-yield formula for fruit and nut trees. Ross premeasured refills make for fast, easy and mess-free fertilizing.