Make sure your evergreens and other acid-loving plants are healthy and thriving all season long with Ross® Root Feeder Refills for Evergreens. 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. The refills are specially formulated for acid-loving plants, such as evergreens, azaleas, magnolias and many others. Ross premeasured refills make for fast, easy and mess-free fertilizing.