How much water does a tree need after planting?
Trees should receive 1.5 to 3.0 gallons (depending on time of year) of water per inch of trunk diameter per day. For example, a three inch caliper tree planted in summer should receive 9 gallons per day. Container-grown trees require more water than field-grown trees during establishment due to the porous nature of the container growing media. Watering should continue at least until the tree is completely established.