Caring for freshly planted or established trees is easier than ever with the 20 Gallon Auto Tree Waterer Bag by Pure Garden. This tree watering bag holds 20 gallons of water, with slow tree drip irrigation directly to the soil for less runoff and maximum root absorption, minimizing water waste. This deep tree watering root irrigation bag fits trees with a trunk 2 to 8-inches in diameter (we do not recommend using for saplings with a trunk diameter of less than 2-inches). For larger trees, you have the option to zip multiple tree watering bags slow release 20 gallon bags together to fit (tree water bags sold individually). Pure Garden is your source for watering bags for new trees and other watering equipment to help create the garden of your dreams.