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Welcome to Benton-Franklin County Extension

Extending Knowledge, Changing Lives. WSU logo over black and white pictures of people reading, Master Gardener booth, classroom learning and field learning.

Washington State University Extension of Benton and Franklin Counties connects area residents to the research and knowledge bases of the state’s land grant research university, providing solutions to local problems and stimulating local economies. Our county-based educators work with partners in your communities to provide educational programs and leverage the broad resources of a major university to resolve issues and create a positive future for the residents of Benton and Franklin Counties.

Learn From The Experts

Our local programs include agriculture and natural resources, 4-H youth, gardening and community horticulture, and food safety and preservation. In addition, Washington State University provides a broad range of consumer publications, online educational opportunities, and other statewide educational programs and technical assistance from four research and extension centers and 11 colleges.

Learn more about us

Prosser office changes, new hours: Tuesday - Thursday, 8:30 a.m. - 4:30 p.m. (closed for lunch 12:00 - 12:30 p.m.); New location: Prosser Courthouse, 620 Market St., Prosser, WA, 1st Floor

Big changes in our Prosser office!

Our Prosser location is re-opening to the public with a new location and new hours! After many years in the same location, we said goodbye to our old building and moved across the street to the first floor of the historic Benton County Courthouse in Prosser!

News & Events

Join Our Team!

Find the job you love. Join the WSU Extension team!

2021 Garden Education Series Class Schedule

2021 Garden Education Series classes brought to you by the WSU Extension Master Gardener Foundation of Benton & Franklin Counties. All classes are taught by Master Gardener Instructors and are free to the public.

FREE Pressure Canner Gauge Testing Available

Our Master Food Preservers are providing FREE pressure canner gauge testing! The USDA recommends having pressure canner gauges tested annually. Testing your pressure canner will determine whether it is functioning properly and will help you produce safely preserved food. Call our office at 509-735-3551 for more information!

Get Answers to Your Lawn and Garden Questions

Our Master Gardeners are still here to help with your garden and landscape questions/problems. Call us or stop by with your sample. We will have a Master Gardener contact you as soon as they can. Monday – Friday 8am-4pm (closed for lunch 12pm-1pm) (509) 736-2726 7102 W. Okanogan Place, Suite 102, Kennewick, WA 99336


Benton County – Kennewick
(Gardening, Horticulture,
Food Preservation, Animal Science)

7102 W. Okanogan Place, Suite 102
Kennewick, WA 99336
(509) 735-3551
Hours: Monday – Friday | 8:00am – 4:00pm
Benton County – Prosser  
(Commerical Tree Fruit, Grapes and Small Fruit)

Benton County Courthouse, 1st Floor
620 Market Street
Prosser, WA 99350-1320
(509) 786-5609
Hours: Tuesday – Thursday | 8:30am – 4:30pm
Franklin County – Pasco
(4-H, Family, Forage and Commercial Vegetables) 

404 W. Clark
Pasco, WA 99301
(509) 545-3511
Hours: Monday – Friday | 8:30am – 5:00pm
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Benton/Franklin County Washington State University Extension logo.