Frost dates for 97471 — Roseburg, OR
Last spring frostMar 23median date
First fall frostNov 18median date
Growing season240 daysfrost-free
Hardiness zone9aZone 9a
How Roseburg compares
- In 8 years out of 10, the last spring frost in Roseburg falls between February 25 and April 16, a 50-day window. The first fall frost falls between October 24 and December 17.
- The median last frost is 24 days earlier than the Oregon median of Apr 16.
- Its 240-day growing season is longer than 81% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 20 days later 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 29 nights a year at or below 32°F.
- Compared with Eugene, OR, 100 km away, the last frost here is 19 days earlier than there and the growing season is 45 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 25 |
| 50% (median) | March 23 |
| 10% (safe for tender plants) | April 16 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 24 |
| 50% (median) | November 18 |
| 90% (late) | December 17 |
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 Roseburg, OR
Frost dates for 97471 — Roseburg, OR — last frost Mar 23, first frost Nov 18, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 29 to Jan 12Start indoors: Dec 29 to Jan 12Transplant outside: Feb 23 to Mar 9
Start indoors: Jan 12 to Jan 26Transplant outside: Apr 6 to Apr 20
Start indoors: Jan 12 to Jan 26Transplant outside: Apr 6 to Apr 20
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 30 to Apr 13
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 2 to Mar 16Sow outdoors: Feb 23 to Mar 30Plant for fall: Sep 23 to Oct 21
Start indoors: Jan 26 to Feb 9Transplant outside: Feb 23 to Mar 9Sow outdoors: Feb 23 to Mar 9Plant for fall: Sep 9 to Sep 30
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 9 to Mar 23Plant for fall: Aug 12 to Sep 2
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 2 to Mar 16Plant for fall: Aug 12 to Sep 2
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 9 to Mar 23Plant for fall: Aug 12 to Sep 2
Start indoors: Feb 9 to Feb 23Transplant outside: Apr 13 to Apr 27Sow outdoors: Apr 13 to Apr 27
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 30 to Apr 13
Sow outdoors: Feb 9 to Mar 2Plant for fall: Aug 26 to Sep 16
Sow outdoors: Feb 9 to Mar 2Plant for fall: Sep 23 to Oct 14
Sow outdoors: Feb 16 to Mar 30Plant for fall: Oct 7 to Oct 28
Start indoors: Feb 23 to Mar 2Transplant outside: Apr 6 to Apr 13Sow outdoors: Mar 30 to Apr 13Plant for fall: Sep 2 to Sep 16
Start indoors: Feb 23 to Mar 2Sow outdoors: Mar 30 to Apr 13Plant for fall: Sep 9 to Sep 23
Start indoors: Feb 23 to Mar 2Sow outdoors: Mar 30 to Apr 13
Start indoors: Feb 23 to Mar 2Transplant outside: Apr 6 to Apr 20
Sow outdoors: Mar 2 to Mar 30Plant for fall: Aug 26 to Sep 9
Sow outdoors: Mar 2 to Mar 30Plant for fall: Sep 9 to Sep 23
Sow outdoors: Mar 2 to Mar 23
Sow outdoors: Mar 9 to Apr 6Plant for fall: Sep 9 to Sep 23
Sow outdoors: Mar 9 to Mar 30Plant for fall: Sep 23 to Oct 14
Sow outdoors: Mar 30 to Apr 20Plant for fall: Sep 2 to Sep 16
Sow outdoors: Mar 30 to Apr 13
Transplant outside: Apr 6 to Apr 27
Plant for fall: Nov 4 to Dec 9
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Roseburg, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 29 – Jan 12 | Feb 23 – Mar 9 | — | — |
| Peppers | Jan 12 – Jan 26 | Apr 6 – Apr 20 | — | — |
| Eggplant | Jan 12 – Jan 26 | Apr 6 – Apr 20 | — | — |
| Tomatoes | Jan 26 – Feb 9 | Mar 30 – Apr 13 | — | — |
| Lettuce | Jan 26 – Feb 9 | Mar 2 – Mar 16 | Feb 23 – Mar 30 | Sep 23 – Oct 21 |
| Kale | Jan 26 – Feb 9 | Feb 23 – Mar 9 | Feb 23 – Mar 9 | Sep 9 – Sep 30 |
| Broccoli | Jan 26 – Feb 9 | Mar 9 – Mar 23 | — | Aug 12 – Sep 2 |
| Cabbage | Jan 26 – Feb 9 | Mar 2 – Mar 16 | — | Aug 12 – Sep 2 |
| Cauliflower | Jan 26 – Feb 9 | Mar 9 – Mar 23 | — | Aug 12 – Sep 2 |
| Okra | Feb 9 – Feb 23 | Apr 13 – Apr 27 | Apr 13 – Apr 27 | — |
| Basil | Feb 9 – Feb 23 | Mar 30 – Apr 13 | — | — |
| Peas | — | — | Feb 9 – Mar 2 | Aug 26 – Sep 16 |
| Spinach | — | — | Feb 9 – Mar 2 | Sep 23 – Oct 14 |
| Radishes | — | — | Feb 16 – Mar 30 | Oct 7 – Oct 28 |
| Cucumbers | Feb 23 – Mar 2 | Apr 6 – Apr 13 | Mar 30 – Apr 13 | Sep 2 – Sep 16 |
| Zucchini & Summer Squash | Feb 23 – Mar 2 | — | Mar 30 – Apr 13 | Sep 9 – Sep 23 |
| Winter Squash & Pumpkins | Feb 23 – Mar 2 | — | Mar 30 – Apr 13 | — |
| Melons & Watermelon | Feb 23 – Mar 2 | Apr 6 – Apr 20 | — | — |
| Carrots | — | — | Mar 2 – Mar 30 | Aug 26 – Sep 9 |
| Beets | — | — | Mar 2 – Mar 30 | Sep 9 – Sep 23 |
| Potatoes | — | — | Mar 2 – Mar 23 | — |
| Swiss Chard | — | — | Mar 9 – Apr 6 | Sep 9 – Sep 23 |
| Cilantro | — | — | Mar 9 – Mar 30 | Sep 23 – Oct 14 |
| Green Beans | — | — | Mar 30 – Apr 20 | Sep 2 – Sep 16 |
| Sweet Corn | — | — | Mar 30 – Apr 13 | — |
| Sweet Potatoes | — | Apr 6 – Apr 27 | — | — |
| Garlic | — | — | — | Nov 4 – Dec 9 |
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 Roseburg Kqen, OR weather station, 12 km away (elevation 427 ft (130 m)).
ZIP codes in Roseburg: 97470 97471
Frost dates near Roseburg
- Tenmile Mar 23 · Nov 18
- Dillard Mar 23 · Nov 18
- Winston Mar 23 · Nov 18
- Umpqua Mar 31 · Nov 5
- Winchester Mar 31 · Nov 5
- Wilbur Mar 31 · Nov 5
- Camas Valley Mar 31 · Nov 6
- Sutherlin Mar 31 · Nov 5
Frequently asked questions
When is the last frost in Roseburg, OR?
The median last spring frost in Roseburg, OR is March 23. There is still about a 10% chance of frost after April 16, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Roseburg, OR?
The median first fall frost is November 18, with about a 10% chance of frost before October 24.
How long is the growing season in Roseburg, OR?
About 240 days between the median last spring frost and first fall frost.
What planting zone is Roseburg, OR?
Roseburg, OR is in USDA hardiness zone 9a.