Underhill A-DD36 Deep Drip Spikes for Palm Trees and Deeper Rooted Trees, 36-Inch Green King Deep Drip Tree Watering Stake 36in Our 36 inch Deep Drip Tree Watering Stakes water your trees and shrubs at the roots While directly watering underground, you will help to conserve water, prevent runoff and erosion, promote deeper roots, and better fertilize the tree Our watering tools easily connect to your automatic drip system or you can even pull up a hose and let the water slowly flow down to the roots