Treegator Jr. Pro Slow Release Watering Bag for Trees and Shrubs Perfect for low branch trees and shrubs with branches starting at least 6 inches above the ground. Fits trees or shrubs with single or multiple trunks totaling up to 5 inches in diameter. Dual PVC elbow-shaped emitters continuously provides water over 5 to 8 hour time period. Requires refilling just once every 5 to 7 days for most new plantings. Deep water saturation promotes deep root growth and reduces transplant and drought shock. Maximum water capacity is approximately 15 gallons