A newly planted tree requires about 1 inch of rain every two weeks– that’s about 20 gallons of water per week. If you would like to help water a neighborhood tree yourself, some residents like to reuse a 1 gallon milk jug or a hose connected to a household water spigot. If using a hose, turn the water pressure to medium-low and allow the water to seep into the ground a few inches from the base of the tree trunk for about 2 minutes. The trick to watering newly planted trees is to go slow and allow the water to penetrate deep into the soil where the tree’s roots are located.