Adrian, OR frost dates
Last spring frostApr 24median date
First fall frostOct 9median date
Growing season168 daysfrost-free
Hardiness zone7aZone 7a
How Adrian compares
- In 8 years out of 10, the last spring frost in Adrian falls between April 9 and May 5, a 26-day window. The first fall frost falls between September 26 and October 23.
- The median last frost is 8 days later than the Oregon median of Apr 16.
- Its 168-day growing season is longer than 34% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 8 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 161 nights a year at or below 32°F.
- Compared with Caldwell, ID, 25 km away, the last frost here is 1 day later than there and the growing season is 10 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 9 |
| 50% (median) | April 24 |
| 10% (safe for tender plants) | May 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 26 |
| 50% (median) | October 9 |
| 90% (late) | October 23 |
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 Adrian, OR
Adrian, OR frost dates — last frost Apr 24, first frost Oct 9, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 30 to Feb 13Transplant outside: Mar 27 to Apr 10
Start indoors: Feb 13 to Feb 27Transplant outside: May 8 to May 22
Start indoors: Feb 13 to Feb 27Transplant outside: May 8 to May 22
Start indoors: Feb 27 to Mar 13Transplant outside: May 1 to May 15
Start indoors: Feb 27 to Mar 13Transplant outside: Apr 3 to Apr 17Sow outdoors: Mar 27 to May 1Plant for fall: Aug 14 to Sep 11
Start indoors: Feb 27 to Mar 13Transplant outside: Mar 27 to Apr 10Sow outdoors: Mar 27 to Apr 10Plant for fall: Jul 31 to Aug 21
Start indoors: Feb 27 to Mar 13Transplant outside: Apr 10 to Apr 24Plant for fall: Jul 3 to Jul 24
Start indoors: Feb 27 to Mar 13Transplant outside: Apr 3 to Apr 17Plant for fall: Jul 3 to Jul 24
Start indoors: Feb 27 to Mar 13Transplant outside: Apr 10 to Apr 24Plant for fall: Jul 3 to Jul 24
Start indoors: Mar 13 to Mar 27Transplant outside: May 15 to May 29Sow outdoors: May 15 to May 29
Start indoors: Mar 13 to Mar 27Transplant outside: May 1 to May 15
Sow outdoors: Mar 13 to Apr 3Plant for fall: Jul 17 to Aug 7
Sow outdoors: Mar 13 to Apr 3Plant for fall: Aug 14 to Sep 4
Sow outdoors: Mar 20 to May 1Plant for fall: Aug 28 to Sep 18
Start indoors: Mar 27 to Apr 3Transplant outside: May 8 to May 15Sow outdoors: May 1 to May 15Plant for fall: Jul 24 to Aug 7
Start indoors: Mar 27 to Apr 3Sow outdoors: May 1 to May 15Plant for fall: Jul 31 to Aug 14
Start indoors: Mar 27 to Apr 3Sow outdoors: May 1 to May 15
Start indoors: Mar 27 to Apr 3Transplant outside: May 8 to May 22
Sow outdoors: Apr 3 to May 1Plant for fall: Jul 17 to Jul 31
Sow outdoors: Apr 3 to May 1Plant for fall: Jul 31 to Aug 14
Sow outdoors: Apr 3 to Apr 24
Sow outdoors: Apr 10 to May 8Plant for fall: Jul 31 to Aug 14
Sow outdoors: Apr 10 to May 1Plant for fall: Aug 14 to Sep 4
Sow outdoors: May 1 to May 22Plant for fall: Jul 24 to Aug 7
Sow outdoors: May 1 to May 15
Transplant outside: May 8 to May 29
Plant for fall: Sep 25 to Oct 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Adrian, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 30 – Feb 13 | Mar 27 – Apr 10 | — | — |
| Peppers | Feb 13 – Feb 27 | May 8 – May 22 | — | — |
| Eggplant | Feb 13 – Feb 27 | May 8 – May 22 | — | — |
| Tomatoes | Feb 27 – Mar 13 | May 1 – May 15 | — | — |
| Lettuce | Feb 27 – Mar 13 | Apr 3 – Apr 17 | Mar 27 – May 1 | Aug 14 – Sep 11 |
| Kale | Feb 27 – Mar 13 | Mar 27 – Apr 10 | Mar 27 – Apr 10 | Jul 31 – Aug 21 |
| Broccoli | Feb 27 – Mar 13 | Apr 10 – Apr 24 | — | Jul 3 – Jul 24 |
| Cabbage | Feb 27 – Mar 13 | Apr 3 – Apr 17 | — | Jul 3 – Jul 24 |
| Cauliflower | Feb 27 – Mar 13 | Apr 10 – Apr 24 | — | Jul 3 – Jul 24 |
| Okra | Mar 13 – Mar 27 | May 15 – May 29 | May 15 – May 29 | — |
| Basil | Mar 13 – Mar 27 | May 1 – May 15 | — | — |
| Peas | — | — | Mar 13 – Apr 3 | Jul 17 – Aug 7 |
| Spinach | — | — | Mar 13 – Apr 3 | Aug 14 – Sep 4 |
| Radishes | — | — | Mar 20 – May 1 | Aug 28 – Sep 18 |
| Cucumbers | Mar 27 – Apr 3 | May 8 – May 15 | May 1 – May 15 | Jul 24 – Aug 7 |
| Zucchini & Summer Squash | Mar 27 – Apr 3 | — | May 1 – May 15 | Jul 31 – Aug 14 |
| Winter Squash & Pumpkins | Mar 27 – Apr 3 | — | May 1 – May 15 | — |
| Melons & Watermelon | Mar 27 – Apr 3 | May 8 – May 22 | — | — |
| Carrots | — | — | Apr 3 – May 1 | Jul 17 – Jul 31 |
| Beets | — | — | Apr 3 – May 1 | Jul 31 – Aug 14 |
| Potatoes | — | — | Apr 3 – Apr 24 | — |
| Swiss Chard | — | — | Apr 10 – May 8 | Jul 31 – Aug 14 |
| Cilantro | — | — | Apr 10 – May 1 | Aug 14 – Sep 4 |
| Green Beans | — | — | May 1 – May 22 | Jul 24 – Aug 7 |
| Sweet Corn | — | — | May 1 – May 15 | — |
| Sweet Potatoes | — | May 8 – May 29 | — | — |
| Garlic | — | — | — | Sep 25 – Oct 30 |
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 Homedale 1 Se, ID weather station, 12 km away (elevation 2,231 ft (680 m)).
Frost dates near Adrian
- Nyssa Apr 18 · Oct 18
- Vale May 8 · Sep 29
- Ontario Apr 22 · Oct 9
- Harper May 7 · Oct 3
- Westfall May 7 · Oct 3
- Jamieson Apr 23 · Oct 13
- Brogan May 7 · Oct 3
- Huntington Apr 23 · Oct 13
- Juntura Jun 5 · Sep 5
- Riverside Jun 7 · Sep 6
Frequently asked questions
When is the last frost in Adrian, OR?
The median last spring frost in Adrian, OR is April 24. There is still about a 10% chance of frost after May 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Adrian, OR?
The median first fall frost is October 9, with about a 10% chance of frost before September 26.
How long is the growing season in Adrian, OR?
About 168 days between the median last spring frost and first fall frost.
What planting zone is Adrian, OR?
Adrian, OR is in USDA hardiness zone 7a.