Medford, OR Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Medford, Oregon.
Gardening in Medford
The Rogue Valley is Oregon's warm pocket — sheltered by mountains, irrigated by the Rogue River, and blessed with more heat and sun than any other valley in the state.
Zone 8a with genuine heat — Medford's summers are closer to Sacramento's than Portland's. Your 230-day growing season is one of the longest in Oregon. The valley location traps warm air, creating conditions that grow grapes, peaches, and melons alongside standard garden vegetables.
The Rogue Valley's pear orchards are legendary, and the same conditions grow exceptional home garden fruit. The Medford Growers Market and the Rogue Valley Farm to School program connect generations of valley agriculture to modern food growing.
What This Means for Medford Gardeners
The average last spring frost in Medford is around March 20, and the average first fall frost arrives around November 5. That gives you approximately 230 frost-free days to work with.
That's a generous season. You have time for full-size tomatoes, long-season peppers, and even watermelons without the anxiety of racing the frost. Start warm-season seeds indoors 6-8 weeks before your last frost to hit the ground running. Fall planting is your second opportunity — garlic, kale, lettuce, and broccoli all go in 8-10 weeks before your first frost for harvest into late autumn.
These dates are based on NOAA 30-year Climate Normal data for the Medford area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Medford
Medford's 230-day growing season is generous — long enough for two full growing windows (spring and fall) with warm-season crops between them. You can grow the full range of vegetables, herbs, and flowers with proper timing. Focus on heat-tolerant varieties for midsummer and cool-season crops for extended fall harvests. Recommended starting points: tomatoes, peppers, beans, cucumbers, squash, garlic, kale, and sunflowers.
See the full Oregon planting guide for all 40 plants: Oregon Planting Calendar. Or enter your zip code for exact planting dates personalized to Medford.
More About Zone 8A
Medford is in USDA Hardiness Zone 8A, which means average annual extreme minimum temperatures between 10°F to 15°F. View the full Zone 8A planting guide.
See the complete planting calendar for Oregon: Oregon Planting Calendar.
Other Cities in Oregon
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Medford area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Medford (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Cool-season crops go in 3-4 weeks before your last frost (March 20). Warm-season crops wait until 2 weeks after. You have time for a fall round too — plant cool-season crops again in late summer for harvest into autumn. Enter your zip code for exact dates.