Adel, OR frost dates
Last spring frostMay 26median date
First fall frostOct 1median date
Growing season128 daysfrost-free
Hardiness zone6bZone 6b
How Adel compares
- In 8 years out of 10, the last spring frost in Adel falls between May 4 and June 13, a 40-day window. The first fall frost falls between September 12 and October 16.
- The median last frost is 40 days later than the Oregon median of Apr 16.
- Its 128-day growing season is longer than 13% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 34 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 149 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 4 |
| 50% (median) | May 26 |
| 10% (safe for tender plants) | June 13 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 12 |
| 50% (median) | October 1 |
| 90% (late) | October 16 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Adel, OR
Adel, OR frost dates — last frost May 26, first frost Oct 1, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Mar 3 to Mar 17Transplant outside: Apr 28 to May 12
Start indoors: Mar 17 to Mar 31Transplant outside: Jun 9 to Jun 23
Start indoors: Mar 17 to Mar 31Transplant outside: Jun 9 to Jun 23
Start indoors: Mar 31 to Apr 14Transplant outside: Jun 2 to Jun 16
Start indoors: Mar 31 to Apr 14Transplant outside: May 5 to May 19Sow outdoors: Apr 28 to Jun 2Plant for fall: Aug 6 to Sep 3
Start indoors: Mar 31 to Apr 14Transplant outside: Apr 28 to May 12Sow outdoors: Apr 28 to May 12Plant for fall: Jul 23 to Aug 13
Start indoors: Mar 31 to Apr 14Transplant outside: May 12 to May 26Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 31 to Apr 14Transplant outside: May 5 to May 19Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 31 to Apr 14Transplant outside: May 12 to May 26Plant for fall: Jun 25 to Jul 16
Start indoors: Apr 14 to Apr 28Transplant outside: Jun 16 to Jun 30Sow outdoors: Jun 16 to Jun 30
Start indoors: Apr 14 to Apr 28Transplant outside: Jun 2 to Jun 16
Sow outdoors: Apr 14 to May 5Plant for fall: Jul 9 to Jul 30
Sow outdoors: Apr 14 to May 5Plant for fall: Aug 6 to Aug 27
Sow outdoors: Apr 21 to Jun 2Plant for fall: Aug 20 to Sep 10
Start indoors: Apr 28 to May 5Transplant outside: Jun 9 to Jun 16Sow outdoors: Jun 2 to Jun 16Plant for fall: Jul 16 to Jul 30
Start indoors: Apr 28 to May 5Sow outdoors: Jun 2 to Jun 16Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 28 to May 5Sow outdoors: Jun 2 to Jun 16
Start indoors: Apr 28 to May 5Transplant outside: Jun 9 to Jun 23
Sow outdoors: May 5 to Jun 2Plant for fall: Jul 9 to Jul 23
Sow outdoors: May 5 to Jun 2Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 5 to May 26
Sow outdoors: May 12 to Jun 9Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 12 to Jun 2Plant for fall: Aug 6 to Aug 27
Sow outdoors: Jun 2 to Jun 23Plant for fall: Jul 16 to Jul 30
Sow outdoors: Jun 2 to Jun 16
Transplant outside: Jun 9 to Jun 30
Plant for fall: Sep 17 to Oct 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Adel, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 3 – Mar 17 | Apr 28 – May 12 | — | — |
| Peppers | Mar 17 – Mar 31 | Jun 9 – Jun 23 | — | — |
| Eggplant | Mar 17 – Mar 31 | Jun 9 – Jun 23 | — | — |
| Tomatoes | Mar 31 – Apr 14 | Jun 2 – Jun 16 | — | — |
| Lettuce | Mar 31 – Apr 14 | May 5 – May 19 | Apr 28 – Jun 2 | Aug 6 – Sep 3 |
| Kale | Mar 31 – Apr 14 | Apr 28 – May 12 | Apr 28 – May 12 | Jul 23 – Aug 13 |
| Broccoli | Mar 31 – Apr 14 | May 12 – May 26 | — | Jun 25 – Jul 16 |
| Cabbage | Mar 31 – Apr 14 | May 5 – May 19 | — | Jun 25 – Jul 16 |
| Cauliflower | Mar 31 – Apr 14 | May 12 – May 26 | — | Jun 25 – Jul 16 |
| Okra | Apr 14 – Apr 28 | Jun 16 – Jun 30 | Jun 16 – Jun 30 | — |
| Basil | Apr 14 – Apr 28 | Jun 2 – Jun 16 | — | — |
| Peas | — | — | Apr 14 – May 5 | Jul 9 – Jul 30 |
| Spinach | — | — | Apr 14 – May 5 | Aug 6 – Aug 27 |
| Radishes | — | — | Apr 21 – Jun 2 | Aug 20 – Sep 10 |
| Cucumbers | Apr 28 – May 5 | Jun 9 – Jun 16 | Jun 2 – Jun 16 | Jul 16 – Jul 30 |
| Zucchini & Summer Squash | Apr 28 – May 5 | — | Jun 2 – Jun 16 | Jul 23 – Aug 6 |
| Winter Squash & Pumpkins | Apr 28 – May 5 | — | Jun 2 – Jun 16 | — |
| Melons & Watermelon | Apr 28 – May 5 | Jun 9 – Jun 23 | — | — |
| Carrots | — | — | May 5 – Jun 2 | Jul 9 – Jul 23 |
| Beets | — | — | May 5 – Jun 2 | Jul 23 – Aug 6 |
| Potatoes | — | — | May 5 – May 26 | — |
| Swiss Chard | — | — | May 12 – Jun 9 | Jul 23 – Aug 6 |
| Cilantro | — | — | May 12 – Jun 2 | Aug 6 – Aug 27 |
| Green Beans | — | — | Jun 2 – Jun 23 | Jul 16 – Jul 30 |
| Sweet Corn | — | — | Jun 2 – Jun 16 | — |
| Sweet Potatoes | — | Jun 9 – Jun 30 | — | — |
| Garlic | — | — | — | Sep 17 – Oct 22 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Ft Bidwell, CA weather station, 38 km away (elevation 4,738 ft (1,444 m)).
Frost dates near Adel
- New Pine Creek May 26 · Oct 1
- Plush frost any month
- Lakeview Jun 4 · Sep 17
- Paisley Jun 6 · Sep 14
- Frenchglen frost any month
- Bly May 31 · Sep 21
- Beatty May 31 · Sep 21
- Summer Lake Jun 8 · Sep 15
- Fields May 10 · Oct 7
- Princeton May 29 · Sep 18
Frequently asked questions
When is the last frost in Adel, OR?
The median last spring frost in Adel, OR is May 26. There is still about a 10% chance of frost after June 13, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Adel, OR?
The median first fall frost is October 1, with about a 10% chance of frost before September 12.
How long is the growing season in Adel, OR?
About 128 days between the median last spring frost and first fall frost.
What planting zone is Adel, OR?
Adel, OR is in USDA hardiness zone 6b.