Mapleton, OR frost dates
Last spring frostFeb 15median date
First fall frostDec 9median date
Growing season297 daysfrost-free
Hardiness zone9aZone 9a
How Mapleton compares
- In 8 years out of 10, the last spring frost in Mapleton falls between December 23 and March 19, a 86-day window. The first fall frost falls between November 9 and January 24.
- The median last frost is 60 days earlier than the Oregon median of Apr 16.
- Its 297-day growing season is among the longest of the 345 Oregon places with a regular frost season.
- The last frost is 16 days earlier than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 22 nights a year at or below 32°F.
- Compared with Eugene, OR, 62 km away, the last frost here is 55 days earlier than there and the growing season is 102 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 23 |
| 50% (median) | February 15 |
| 10% (safe for tender plants) | March 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 9 |
| 50% (median) | December 9 |
| 90% (late) | January 24 |
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 Mapleton, OR
Mapleton, OR frost dates — last frost Feb 15, first frost Dec 9, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Nov 23 to Dec 7Transplant outside: Jan 18 to Feb 1
Start indoors: Dec 7 to Dec 21Transplant outside: Mar 1 to Mar 15
Start indoors: Dec 7 to Dec 21Transplant outside: Mar 1 to Mar 15
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 22 to Mar 8
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 25 to Feb 8Sow outdoors: Jan 18 to Feb 22Plant for fall: Oct 14 to Nov 11
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 18 to Feb 1Sow outdoors: Jan 18 to Feb 1Plant for fall: Sep 30 to Oct 21
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 1 to Feb 15Plant for fall: Sep 2 to Sep 23
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 25 to Feb 8Plant for fall: Sep 2 to Sep 23
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 1 to Feb 15Plant for fall: Sep 2 to Sep 23
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 8 to Mar 22Sow outdoors: Mar 8 to Mar 22
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 22 to Mar 8
Sow outdoors: Jan 4 to Jan 25Plant for fall: Sep 16 to Oct 7
Sow outdoors: Jan 4 to Jan 25Plant for fall: Oct 14 to Nov 4
Sow outdoors: Jan 11 to Feb 22Plant for fall: Oct 28 to Nov 18
Start indoors: Jan 18 to Jan 25Transplant outside: Mar 1 to Mar 8Sow outdoors: Feb 22 to Mar 8Plant for fall: Sep 23 to Oct 7
Start indoors: Jan 18 to Jan 25Sow outdoors: Feb 22 to Mar 8Plant for fall: Sep 30 to Oct 14
Start indoors: Jan 18 to Jan 25Sow outdoors: Feb 22 to Mar 8
Start indoors: Jan 18 to Jan 25Transplant outside: Mar 1 to Mar 15
Sow outdoors: Jan 25 to Feb 22Plant for fall: Sep 16 to Sep 30
Sow outdoors: Jan 25 to Feb 22Plant for fall: Sep 30 to Oct 14
Sow outdoors: Jan 25 to Feb 15
Sow outdoors: Feb 1 to Mar 1Plant for fall: Sep 30 to Oct 14
Sow outdoors: Feb 1 to Feb 22Plant for fall: Oct 14 to Nov 4
Sow outdoors: Feb 22 to Mar 15Plant for fall: Sep 23 to Oct 7
Sow outdoors: Feb 22 to Mar 8
Transplant outside: Mar 1 to Mar 22
Plant for fall: Nov 25 to Dec 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mapleton, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 23 – Dec 7 | Jan 18 – Feb 1 | — | — |
| Peppers | Dec 7 – Dec 21 | Mar 1 – Mar 15 | — | — |
| Eggplant | Dec 7 – Dec 21 | Mar 1 – Mar 15 | — | — |
| Tomatoes | Dec 21 – Jan 4 | Feb 22 – Mar 8 | — | — |
| Lettuce | Dec 21 – Jan 4 | Jan 25 – Feb 8 | Jan 18 – Feb 22 | Oct 14 – Nov 11 |
| Kale | Dec 21 – Jan 4 | Jan 18 – Feb 1 | Jan 18 – Feb 1 | Sep 30 – Oct 21 |
| Broccoli | Dec 21 – Jan 4 | Feb 1 – Feb 15 | — | Sep 2 – Sep 23 |
| Cabbage | Dec 21 – Jan 4 | Jan 25 – Feb 8 | — | Sep 2 – Sep 23 |
| Cauliflower | Dec 21 – Jan 4 | Feb 1 – Feb 15 | — | Sep 2 – Sep 23 |
| Okra | Jan 4 – Jan 18 | Mar 8 – Mar 22 | Mar 8 – Mar 22 | — |
| Basil | Jan 4 – Jan 18 | Feb 22 – Mar 8 | — | — |
| Peas | — | — | Jan 4 – Jan 25 | Sep 16 – Oct 7 |
| Spinach | — | — | Jan 4 – Jan 25 | Oct 14 – Nov 4 |
| Radishes | — | — | Jan 11 – Feb 22 | Oct 28 – Nov 18 |
| Cucumbers | Jan 18 – Jan 25 | Mar 1 – Mar 8 | Feb 22 – Mar 8 | Sep 23 – Oct 7 |
| Zucchini & Summer Squash | Jan 18 – Jan 25 | — | Feb 22 – Mar 8 | Sep 30 – Oct 14 |
| Winter Squash & Pumpkins | Jan 18 – Jan 25 | — | Feb 22 – Mar 8 | — |
| Melons & Watermelon | Jan 18 – Jan 25 | Mar 1 – Mar 15 | — | — |
| Carrots | — | — | Jan 25 – Feb 22 | Sep 16 – Sep 30 |
| Beets | — | — | Jan 25 – Feb 22 | Sep 30 – Oct 14 |
| Potatoes | — | — | Jan 25 – Feb 15 | — |
| Swiss Chard | — | — | Feb 1 – Mar 1 | Sep 30 – Oct 14 |
| Cilantro | — | — | Feb 1 – Feb 22 | Oct 14 – Nov 4 |
| Green Beans | — | — | Feb 22 – Mar 15 | Sep 23 – Oct 7 |
| Sweet Corn | — | — | Feb 22 – Mar 8 | — |
| Sweet Potatoes | — | Mar 1 – Mar 22 | — | — |
| Garlic | — | — | — | Nov 25 – Dec 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 Mapleton, OR weather station, about 1 km away (elevation 16 ft (5 m)).
Frost dates near Mapleton
- Swisshome Feb 15 · Dec 9
- Westlake Mar 28 · Nov 22
- Florence Apr 10 · Nov 15
- Deadwood Feb 15 · Dec 9
- Walton Apr 18 · Oct 25
- Blachly Apr 18 · Oct 25
- Noti Apr 18 · Oct 25
- Yachats Feb 19 · Dec 11
- Gardiner Mar 25 · Nov 24
- Scottsburg Apr 11 · Nov 6
Frequently asked questions
When is the last frost in Mapleton, OR?
The median last spring frost in Mapleton, OR is February 15. There is still about a 10% chance of frost after March 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mapleton, OR?
The median first fall frost is December 9, with about a 10% chance of frost before November 9.
How long is the growing season in Mapleton, OR?
About 297 days between the median last spring frost and first fall frost.
What planting zone is Mapleton, OR?
Mapleton, OR is in USDA hardiness zone 9a.