How Often Should You Water a Tree

You should water mature trees once every 2 to 4 weeks. Trees that are 2 years old or younger, should be watered once every 10 to 14 days.

You should give your tree about 10 gallons of water per inch of trunk diameter.
If you are using a hose without an attachment, you will be watering about 10 gallons every 5 minutes. To be exact, you can time how long it takes to fill a 5 gallon bucket.

You want to water the tree from the base to the drip line, the width of the branches. One thorough watering is healthier than frequent shallow watering. You want the soil to dry out so the roots can absorb oxygen.