Planting Dates for Oregon
Oregon's Willamette Valley is one of the premier growing regions in the US, with mild temperatures and fertile soil. East of the Cascades, conditions are drier and more continental.
USDA Zones 4b-9b • 100-260 frost-free days depending on location
Frost Dates in Oregon
Average last spring frost and first fall frost dates for Oregon cities. Use these to calculate your planting windows.
| City | Last Spring Frost | First Fall Frost | Frost-Free Days | USDA Zone |
|---|---|---|---|---|
| Portland | Mar 23 | Nov 7 | 229 | 8b |
| Eugene | Apr 7 | Oct 28 | 204 | 8b |
| Bend | Jun 5 | Sep 8 | 95 | 6a |
Gardening Tips for Oregon
- ✓The Willamette Valley has excellent year-round gardening conditions.
- ✓Start cool crops outdoors in February-March in western Oregon.
- ✓Eastern Oregon is drier and sunnier — irrigation is essential.
- ✓Oregon's mild autumns support fall and winter gardening west of the Cascades.
What to Plant in Oregon
Cold-Hardy Crops (plant early)
These crops tolerate frost and can be planted 2-6 weeks before your last frost date.
30-60 days from sowing
55-70 days from sowing
60-80 days from sowing
50-70 days from sowing
55-80 days from transplant
35-50 days from sowing
20-35 days from sowing
July-August the following year
90-120 days from transplant
70-120 days from planting
50-70 days from sowing
50-60 days from sowing
Warm-Season Crops (plant after last frost)
Start these indoors and transplant after all frost danger has passed.
60-85 days from transplant
60-90 days from transplant
50-65 days from sowing
50-65 days from sowing
45-60 days from sowing
60-100 days from sowing
30-60 days from sowing
Get Exact Planting Dates for Oregon
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Frequently Asked Questions
When is the last frost date in Oregon?
Last frost dates in Oregon vary by city: Portland (Mar 23), Eugene (Apr 7), Bend (Jun 5).
What USDA hardiness zones are in Oregon?
Oregon spans USDA hardiness zones 4b-9b. Your specific zone determines which perennials survive winter and when to start planting annuals.
What vegetables grow best in Oregon?
Hardy crops like peas, kale, spinach, and garlic thrive across Oregon. In warmer zones, tomatoes, peppers, and cucumbers do well with proper timing. Use our free calculator for exact planting dates.
How long is the growing season in Oregon?
100-260 frost-free days depending on location. Extend your season with cold frames, row covers, and indoor seed starting.
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Free Calculator
Calculate exact planting dates based on your location and frost dates.