Ross Fruit & Nut Tree Fertilizer Refills Root Feeder, 9-46-15 (Ideal for Watering During Droughts) High Yield Fruit Formula, 12 Refills Pre-measured Ross Fertilizer Refills for Fruit & Nut Trees makes for fast, easy and mess-free fertilizing Ross Root Feeder System stops pollution from fertilizer run-off and costly waste of water from evaporation; Ideal for watering during droughts Deep feeding fertilizer system supplies nutrients at the root level, where the active roots are growing; Encourages deep root development for improved tree and shrub stability Feed established fruit and nut trees in spring at first signs of new growth; Feed young fruit and nut trees monthly through mid- summer Guaranteed analysis: (9-46-15) 12 refills, (9-46-15) 54 refills