Carlton, OR frost dates
Last spring frostApr 5median date
First fall frostNov 7median date
Growing season216 daysfrost-free
Hardiness zone8bZone 8b
How Carlton compares
- In 8 years out of 10, the last spring frost in Carlton falls between March 5 and April 27, a 53-day window. The first fall frost falls between October 20 and December 1.
- The median last frost is 11 days earlier than the Oregon median of Apr 16.
- Its 216-day growing season is longer than 64% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 20 days later than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 46 nights a year at or below 32°F.
- Compared with Hillsboro, OR, 30 km away, the last frost here is 11 days earlier than there and the growing season is 26 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 5 |
| 50% (median) | April 5 |
| 10% (safe for tender plants) | April 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 20 |
| 50% (median) | November 7 |
| 90% (late) | December 1 |
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 Carlton, OR
Carlton, OR frost dates — last frost Apr 5, first frost Nov 7, zone 8b. whenisthelastfrost.com
Crop
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Start indoors: Jan 11 to Jan 25Transplant outside: Mar 8 to Mar 22
Start indoors: Jan 25 to Feb 8Transplant outside: Apr 19 to May 3
Start indoors: Jan 25 to Feb 8Transplant outside: Apr 19 to May 3
Start indoors: Feb 8 to Feb 22Transplant outside: Apr 12 to Apr 26
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 8 to Apr 12Plant for fall: Sep 12 to Oct 10
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 8 to Mar 22Sow outdoors: Mar 8 to Mar 22Plant for fall: Aug 29 to Sep 19
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 22 to Apr 5Plant for fall: Aug 1 to Aug 22
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 15 to Mar 29Plant for fall: Aug 1 to Aug 22
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 22 to Apr 5Plant for fall: Aug 1 to Aug 22
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 26 to May 10Sow outdoors: Apr 26 to May 10
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 12 to Apr 26
Sow outdoors: Feb 22 to Mar 15Plant for fall: Aug 15 to Sep 5
Sow outdoors: Feb 22 to Mar 15Plant for fall: Sep 12 to Oct 3
Sow outdoors: Mar 1 to Apr 12Plant for fall: Sep 26 to Oct 17
Start indoors: Mar 8 to Mar 15Transplant outside: Apr 19 to Apr 26Sow outdoors: Apr 12 to Apr 26Plant for fall: Aug 22 to Sep 5
Start indoors: Mar 8 to Mar 15Sow outdoors: Apr 12 to Apr 26Plant for fall: Aug 29 to Sep 12
Start indoors: Mar 8 to Mar 15Sow outdoors: Apr 12 to Apr 26
Start indoors: Mar 8 to Mar 15Transplant outside: Apr 19 to May 3
Sow outdoors: Mar 15 to Apr 12Plant for fall: Aug 15 to Aug 29
Sow outdoors: Mar 15 to Apr 12Plant for fall: Aug 29 to Sep 12
Sow outdoors: Mar 15 to Apr 5
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 29 to Sep 12
Sow outdoors: Mar 22 to Apr 12Plant for fall: Sep 12 to Oct 3
Sow outdoors: Apr 12 to May 3Plant for fall: Aug 22 to Sep 5
Sow outdoors: Apr 12 to Apr 26
Transplant outside: Apr 19 to May 10
Plant for fall: Oct 24 to Nov 28
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Carlton, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 11 – Jan 25 | Mar 8 – Mar 22 | — | — |
| Peppers | Jan 25 – Feb 8 | Apr 19 – May 3 | — | — |
| Eggplant | Jan 25 – Feb 8 | Apr 19 – May 3 | — | — |
| Tomatoes | Feb 8 – Feb 22 | Apr 12 – Apr 26 | — | — |
| Lettuce | Feb 8 – Feb 22 | Mar 15 – Mar 29 | Mar 8 – Apr 12 | Sep 12 – Oct 10 |
| Kale | Feb 8 – Feb 22 | Mar 8 – Mar 22 | Mar 8 – Mar 22 | Aug 29 – Sep 19 |
| Broccoli | Feb 8 – Feb 22 | Mar 22 – Apr 5 | — | Aug 1 – Aug 22 |
| Cabbage | Feb 8 – Feb 22 | Mar 15 – Mar 29 | — | Aug 1 – Aug 22 |
| Cauliflower | Feb 8 – Feb 22 | Mar 22 – Apr 5 | — | Aug 1 – Aug 22 |
| Okra | Feb 22 – Mar 8 | Apr 26 – May 10 | Apr 26 – May 10 | — |
| Basil | Feb 22 – Mar 8 | Apr 12 – Apr 26 | — | — |
| Peas | — | — | Feb 22 – Mar 15 | Aug 15 – Sep 5 |
| Spinach | — | — | Feb 22 – Mar 15 | Sep 12 – Oct 3 |
| Radishes | — | — | Mar 1 – Apr 12 | Sep 26 – Oct 17 |
| Cucumbers | Mar 8 – Mar 15 | Apr 19 – Apr 26 | Apr 12 – Apr 26 | Aug 22 – Sep 5 |
| Zucchini & Summer Squash | Mar 8 – Mar 15 | — | Apr 12 – Apr 26 | Aug 29 – Sep 12 |
| Winter Squash & Pumpkins | Mar 8 – Mar 15 | — | Apr 12 – Apr 26 | — |
| Melons & Watermelon | Mar 8 – Mar 15 | Apr 19 – May 3 | — | — |
| Carrots | — | — | Mar 15 – Apr 12 | Aug 15 – Aug 29 |
| Beets | — | — | Mar 15 – Apr 12 | Aug 29 – Sep 12 |
| Potatoes | — | — | Mar 15 – Apr 5 | — |
| Swiss Chard | — | — | Mar 22 – Apr 19 | Aug 29 – Sep 12 |
| Cilantro | — | — | Mar 22 – Apr 12 | Sep 12 – Oct 3 |
| Green Beans | — | — | Apr 12 – May 3 | Aug 22 – Sep 5 |
| Sweet Corn | — | — | Apr 12 – Apr 26 | — |
| Sweet Potatoes | — | Apr 19 – May 10 | — | — |
| Garlic | — | — | — | Oct 24 – Nov 28 |
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 Mc Minnville, OR weather station, 7 km away (elevation 154 ft (47 m)).
Frost dates near Carlton
- Lafayette Apr 5 · Nov 7
- Yamhill Apr 5 · Nov 7
- Mcminnville Apr 5 · Nov 7
- Dundee Mar 21 · Nov 22
- Dayton Apr 15 · Oct 26
- Newberg Mar 21 · Nov 22
- Gaston Apr 16 · Oct 26
- Saint Paul Mar 21 · Nov 22
- Amity Apr 15 · Oct 26
- Sherwood Mar 21 · Nov 22
Frequently asked questions
When is the last frost in Carlton, OR?
The median last spring frost in Carlton, OR is April 5. There is still about a 10% chance of frost after April 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Carlton, OR?
The median first fall frost is November 7, with about a 10% chance of frost before October 20.
How long is the growing season in Carlton, OR?
About 216 days between the median last spring frost and first fall frost.
What planting zone is Carlton, OR?
Carlton, OR is in USDA hardiness zone 8b.