Research Farms

Tractor in field.

HP Singleton

This unit is a 191-acre site located five miles northeast of Prosser, Washington. It consists of laboratory and office buildings, greenhouses, a dormitory, and other support facilities. The Headquarters unit includes Hamilton Hall and dedicated research facilities for the Clean Plant Center Northwest, AgWeatherNet, and the Center for Precision and Automated Agricultural Systems. Field research sites are available on approximately 120 acres, under gravity, trickle and pressure irrigation systems.
Signs in field marking crops.


This unit is a 427-acre site located 80 miles northeast of Prosser within the Columbia Basin Irrigation Project near Othello, Washington (1471 W. Cox Rd.). This unit provides field research sites for faculty from WSU Prosser IAREC, the College of Agricultural, Human, and Natural Resource Sciences, the USDA-ARS, and the Washington State Crop Improvement Association. Farming and irrigation services for all sites are provided by the farm operations team.
Aerial view of crops.


This unit is a 320-acre site located 3 miles north of the H.P. Singleton Headquarters and provides WSU Prosser IAREC and USDA-ARS scientists with field research sites having pressure, trickle or gravity irrigation systems. The Roza unit includes row crop test plots, as well as research orchard, vineyard, and hopyard research plots.

Pear Acres

This unit is a 26-acre site located north of the Roza canal on Evans Road in Prosser. Currently this unit is used by the USDA-ARS and supports critical potato pathology research.

Royal Slope

This unit is a 184-acre site located in Grant County on the Royal Slope. It is currently leased to Cougar Ranches, LLC and is in tree fruit production.

Perennial & Annual Crops

WSU Prosser IAREC and USDA-ARS faculty scientists, graduate students, and technical staff conduct collaborative and translational research on a variety of perennial crops, including tree fruit (apple, cherry, peach), blueberries, hops, peppermint, and grapes (wine, table, and juice). Row crop research is conducted on alfalfa seed, forage crops, legumes, and potatoes.

Ripe blueberries on a bush.
Plate of red apples.
WSU image - kkb - Prosser Wine Grapes
BrianIrish Isolation-cages on Roza farm.