Jacksonville, OR frost dates
Last spring frostMay 4median date
First fall frostOct 13median date
Growing season162 daysfrost-free
Hardiness zone8aZone 8a
How Jacksonville compares
- In 8 years out of 10, the last spring frost in Jacksonville falls between April 15 and May 23, a 38-day window. The first fall frost falls between September 22 and October 30.
- The median last frost is 18 days later than the Oregon median of Apr 16.
- Its 162-day growing season is longer than 30% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 36 days later than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 103 nights a year at or below 32°F.
- Compared with Medford, OR, 19 km away, the last frost here is 26 days later than there and the growing season is 42 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 15 |
| 50% (median) | May 4 |
| 10% (safe for tender plants) | May 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 22 |
| 50% (median) | October 13 |
| 90% (late) | October 30 |
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 Jacksonville, OR
Jacksonville, OR frost dates — last frost May 4, first frost Oct 13, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 9 to Feb 23Transplant outside: Apr 6 to Apr 20
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Mar 9 to Mar 23Transplant outside: May 11 to May 25
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Sow outdoors: Apr 6 to May 11Plant for fall: Aug 18 to Sep 15
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 6 to Apr 20Sow outdoors: Apr 6 to Apr 20Plant for fall: Aug 4 to Aug 25
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 23 to Apr 6Transplant outside: May 25 to Jun 8Sow outdoors: May 25 to Jun 8
Start indoors: Mar 23 to Apr 6Transplant outside: May 11 to May 25
Sow outdoors: Mar 23 to Apr 13Plant for fall: Jul 21 to Aug 11
Sow outdoors: Mar 23 to Apr 13Plant for fall: Aug 18 to Sep 8
Sow outdoors: Mar 30 to May 11Plant for fall: Sep 1 to Sep 22
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to May 25Sow outdoors: May 11 to May 25Plant for fall: Jul 28 to Aug 11
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25Plant for fall: Aug 4 to Aug 18
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to Jun 1
Sow outdoors: Apr 13 to May 11Plant for fall: Jul 21 to Aug 4
Sow outdoors: Apr 13 to May 11Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 13 to May 4
Sow outdoors: Apr 20 to May 18Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 20 to May 11Plant for fall: Aug 18 to Sep 8
Sow outdoors: May 11 to Jun 1Plant for fall: Jul 28 to Aug 11
Sow outdoors: May 11 to May 25
Transplant outside: May 18 to Jun 8
Plant for fall: Sep 29 to Nov 3
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Jacksonville, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 9 – Feb 23 | Apr 6 – Apr 20 | — | — |
| Peppers | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Eggplant | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Tomatoes | Mar 9 – Mar 23 | May 11 – May 25 | — | — |
| Lettuce | Mar 9 – Mar 23 | Apr 13 – Apr 27 | Apr 6 – May 11 | Aug 18 – Sep 15 |
| Kale | Mar 9 – Mar 23 | Apr 6 – Apr 20 | Apr 6 – Apr 20 | Aug 4 – Aug 25 |
| Broccoli | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jul 7 – Jul 28 |
| Cabbage | Mar 9 – Mar 23 | Apr 13 – Apr 27 | — | Jul 7 – Jul 28 |
| Cauliflower | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jul 7 – Jul 28 |
| Okra | Mar 23 – Apr 6 | May 25 – Jun 8 | May 25 – Jun 8 | — |
| Basil | Mar 23 – Apr 6 | May 11 – May 25 | — | — |
| Peas | — | — | Mar 23 – Apr 13 | Jul 21 – Aug 11 |
| Spinach | — | — | Mar 23 – Apr 13 | Aug 18 – Sep 8 |
| Radishes | — | — | Mar 30 – May 11 | Sep 1 – Sep 22 |
| Cucumbers | Apr 6 – Apr 13 | May 18 – May 25 | May 11 – May 25 | Jul 28 – Aug 11 |
| Zucchini & Summer Squash | Apr 6 – Apr 13 | — | May 11 – May 25 | Aug 4 – Aug 18 |
| Winter Squash & Pumpkins | Apr 6 – Apr 13 | — | May 11 – May 25 | — |
| Melons & Watermelon | Apr 6 – Apr 13 | May 18 – Jun 1 | — | — |
| Carrots | — | — | Apr 13 – May 11 | Jul 21 – Aug 4 |
| Beets | — | — | Apr 13 – May 11 | Aug 4 – Aug 18 |
| Potatoes | — | — | Apr 13 – May 4 | — |
| Swiss Chard | — | — | Apr 20 – May 18 | Aug 4 – Aug 18 |
| Cilantro | — | — | Apr 20 – May 11 | Aug 18 – Sep 8 |
| Green Beans | — | — | May 11 – Jun 1 | Jul 28 – Aug 11 |
| Sweet Corn | — | — | May 11 – May 25 | — |
| Sweet Potatoes | — | May 18 – Jun 8 | — | — |
| Garlic | — | — | — | Sep 29 – Nov 3 |
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 Ruch, OR weather station, 5 km away (elevation 1,549 ft (472 m)).
Frost dates near Jacksonville
- Medford Apr 8 · Oct 29
- Phoenix May 6 · Oct 8
- Talent May 6 · Oct 8
- Williams May 4 · Oct 13
- Central Point Apr 8 · Oct 29
- Ashland May 6 · Oct 8
- Gold Hill Apr 8 · Oct 29
- Murphy Apr 8 · Oct 28
- White City Apr 8 · Oct 29
- Rogue River Apr 8 · Oct 28
Frequently asked questions
When is the last frost in Jacksonville, OR?
The median last spring frost in Jacksonville, OR is May 4. There is still about a 10% chance of frost after May 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Jacksonville, OR?
The median first fall frost is October 13, with about a 10% chance of frost before September 22.
How long is the growing season in Jacksonville, OR?
About 162 days between the median last spring frost and first fall frost.
What planting zone is Jacksonville, OR?
Jacksonville, OR is in USDA hardiness zone 8a.