Sweet Home, OR frost dates
Last spring frostApr 12median date
First fall frostOct 28median date
Growing season199 daysfrost-free
Hardiness zone8bZone 8b
How Sweet Home compares
- In 8 years out of 10, the last spring frost in Sweet Home falls between March 16 and May 5, a 50-day window. The first fall frost falls between October 5 and November 21.
- The median last frost is 4 days earlier than the Oregon median of Apr 16.
- Its 199-day growing season is longer than 54% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 27 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 55 nights a year at or below 32°F.
- Compared with Albany, OR, 40 km away, the last frost here is 5 days earlier than there and the growing season is 5 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 16 |
| 50% (median) | April 12 |
| 10% (safe for tender plants) | May 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 5 |
| 50% (median) | October 28 |
| 90% (late) | November 21 |
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 Sweet Home, OR
Sweet Home, OR frost dates — last frost Apr 12, first frost Oct 28, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 15 to Mar 29
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 15 to Mar 1Transplant outside: Apr 19 to May 3
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 15 to Apr 19Plant for fall: Sep 2 to Sep 30
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 15 to Mar 29Plant for fall: Aug 19 to Sep 9
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 22 to Aug 12
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Plant for fall: Jul 22 to Aug 12
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 22 to Aug 12
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 19 to May 3
Sow outdoors: Mar 1 to Mar 22Plant for fall: Aug 5 to Aug 26
Sow outdoors: Mar 1 to Mar 22Plant for fall: Sep 2 to Sep 23
Sow outdoors: Mar 8 to Apr 19Plant for fall: Sep 16 to Oct 7
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 3Sow outdoors: Apr 19 to May 3Plant for fall: Aug 12 to Aug 26
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3Plant for fall: Aug 19 to Sep 2
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 10
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 5 to Aug 19
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 19 to Sep 2
Sow outdoors: Mar 22 to Apr 12
Sow outdoors: Mar 29 to Apr 26Plant for fall: Aug 19 to Sep 2
Sow outdoors: Mar 29 to Apr 19Plant for fall: Sep 2 to Sep 23
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 12 to Aug 26
Sow outdoors: Apr 19 to May 3
Transplant outside: Apr 26 to May 17
Plant for fall: Oct 14 to Nov 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sweet Home, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 18 – Feb 1 | Mar 15 – Mar 29 | — | — |
| Peppers | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Eggplant | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Tomatoes | Feb 15 – Mar 1 | Apr 19 – May 3 | — | — |
| Lettuce | Feb 15 – Mar 1 | Mar 22 – Apr 5 | Mar 15 – Apr 19 | Sep 2 – Sep 30 |
| Kale | Feb 15 – Mar 1 | Mar 15 – Mar 29 | Mar 15 – Mar 29 | Aug 19 – Sep 9 |
| Broccoli | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 22 – Aug 12 |
| Cabbage | Feb 15 – Mar 1 | Mar 22 – Apr 5 | — | Jul 22 – Aug 12 |
| Cauliflower | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 22 – Aug 12 |
| Okra | Mar 1 – Mar 15 | May 3 – May 17 | May 3 – May 17 | — |
| Basil | Mar 1 – Mar 15 | Apr 19 – May 3 | — | — |
| Peas | — | — | Mar 1 – Mar 22 | Aug 5 – Aug 26 |
| Spinach | — | — | Mar 1 – Mar 22 | Sep 2 – Sep 23 |
| Radishes | — | — | Mar 8 – Apr 19 | Sep 16 – Oct 7 |
| Cucumbers | Mar 15 – Mar 22 | Apr 26 – May 3 | Apr 19 – May 3 | Aug 12 – Aug 26 |
| Zucchini & Summer Squash | Mar 15 – Mar 22 | — | Apr 19 – May 3 | Aug 19 – Sep 2 |
| Winter Squash & Pumpkins | Mar 15 – Mar 22 | — | Apr 19 – May 3 | — |
| Melons & Watermelon | Mar 15 – Mar 22 | Apr 26 – May 10 | — | — |
| Carrots | — | — | Mar 22 – Apr 19 | Aug 5 – Aug 19 |
| Beets | — | — | Mar 22 – Apr 19 | Aug 19 – Sep 2 |
| Potatoes | — | — | Mar 22 – Apr 12 | — |
| Swiss Chard | — | — | Mar 29 – Apr 26 | Aug 19 – Sep 2 |
| Cilantro | — | — | Mar 29 – Apr 19 | Sep 2 – Sep 23 |
| Green Beans | — | — | Apr 19 – May 10 | Aug 12 – Aug 26 |
| Sweet Corn | — | — | Apr 19 – May 3 | — |
| Sweet Potatoes | — | Apr 26 – May 17 | — | — |
| Garlic | — | — | — | Oct 14 – Nov 18 |
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 Foster Dam, OR weather station, 5 km away (elevation 551 ft (168 m)).
Frost dates near Sweet Home
- Crawfordsville Apr 12 · Oct 28
- Foster Apr 29 · Oct 13
- Brownsville Mar 14 · Nov 18
- Lebanon Mar 14 · Nov 18
- Cascadia Apr 29 · Oct 13
- Marcola Apr 3 · Nov 11
- Crabtree Mar 14 · Nov 18
- Shedd Apr 11 · Oct 30
- Walterville Apr 3 · Nov 11
- Halsey Apr 11 · Oct 30
Frequently asked questions
When is the last frost in Sweet Home, OR?
The median last spring frost in Sweet Home, OR is April 12. 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 Sweet Home, OR?
The median first fall frost is October 28, with about a 10% chance of frost before October 5.
How long is the growing season in Sweet Home, OR?
About 199 days between the median last spring frost and first fall frost.
What planting zone is Sweet Home, OR?
Sweet Home, OR is in USDA hardiness zone 8b.