Umatilla County, Oregon
Hermiston watermelons — where life is sweet
The authoritative guide to Eastern Oregon's most famous fruit: why Hermiston melons taste different, how they're grown, and where to find them.
Columbia Basin climate concentrates natural sugars for melons sweeter than most growing regions.
Family farms in Umatilla County have raised watermelons since the early 1900s.
Sold from Seattle to Portland and beyond — Hermiston is to watermelons what Walla Walla is to onions.
Explore Hermiston watermelons
Why Hermiston?
Climate, soil, irrigation, and branding — what makes these melons famous.
History
From early 1900s farms to Mayor Harkenrider's Portland deliveries and today's MelonFest.
Learning Center
Guides on picking, varieties, nutrition, growing, and Oregon harvest season.
Local Growers
Directory of Umatilla County watermelon farms — listings coming soon.
For Buyers
Wholesale, food service, and regional distributors — source Hermiston melons.
Watermelon learning center
Searching for watermelon facts? Start here — written for shoppers, students, and curious eaters.
How to Pick a Ripe Watermelon
Field thump test, color cues, and what to look for at the stand.
Watermelon Varieties
Seedless, mini, and classic striped melons grown in the Columbia Basin.
Nutrition & Health
Hydration, lycopene, and why watermelon is a summer superfruit.
How Watermelons Grow
From seed to harvest — and why Hermiston soil and climate matter.
Oregon Watermelon Season
When Hermiston melons ripen and where to find them.
Frequently asked questions
- Why is Hermiston famous for watermelons?
- Sandy soil, Columbia River irrigation, and hot days paired with cool nights produce exceptionally sweet melons. Civic promotion since the 1960s — including watermelon deliveries to Portland's mayor — cemented the brand across the Northwest.
- When is watermelon season in Hermiston?
- Peak harvest is typically mid-July through August. Early fruit may appear in late June during warm years.
- How much watermelon does Umatilla County produce?
- Industry sources have cited roughly 45,000 tons annually from about five major growers and several smaller farms on roughly 750 acres — a niche crop, but a defining part of Hermiston's identity.
Wholesale buyers & regional partners
Looking to source Hermiston watermelons for your market, restaurant group, or distribution network? See our buyer resources.
For Buyers