Irrigation in the Pacific Northwest

Tree Water Management

AgriMet provides daily reference evapotranspiration graphs for each AgriMet station. Enter the daily water use from a station listed on its AgriMet graph.

If you are watering trees with a garden hose, you can determine the minutes required to deliver the gallons of water shown above from the Garden Hose Flow calculator.

Learn more about the units used on this page.


Tree Type:
Tree Spread Diameter:
Daily Water Use:

Watering Period

Water Quantity
1-4 days
5-7 days
8-10 days
10+ days

WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,