Broadbent, OR frost dates
Last spring frostMar 21median date
First fall frostNov 14median date
Growing season238 daysfrost-free
Hardiness zone9aZone 9a
How Broadbent compares
- In 8 years out of 10, the last spring frost in Broadbent falls between February 16 and April 12, a 55-day window. The first fall frost falls between October 21 and December 14.
- The median last frost is 26 days earlier than the Oregon median of Apr 16.
- Its 238-day growing season is longer than 80% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 18 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 40 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 16 |
| 50% (median) | March 21 |
| 10% (safe for tender plants) | April 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 21 |
| 50% (median) | November 14 |
| 90% (late) | December 14 |
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 Broadbent, OR
Broadbent, OR frost dates — last frost Mar 21, first frost Nov 14, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Dec 27 to Jan 10Start indoors: Dec 27 to Jan 10Transplant outside: Feb 21 to Mar 7
Start indoors: Jan 10 to Jan 24Transplant outside: Apr 4 to Apr 18
Start indoors: Jan 10 to Jan 24Transplant outside: Apr 4 to Apr 18
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 28 to Apr 11
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 28 to Mar 14Sow outdoors: Feb 21 to Mar 28Plant for fall: Sep 19 to Oct 17
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 21 to Mar 7Sow outdoors: Feb 21 to Mar 7Plant for fall: Sep 5 to Sep 26
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 7 to Mar 21Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 24 to Feb 7Transplant outside: Feb 28 to Mar 14Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 24 to Feb 7Transplant outside: Mar 7 to Mar 21Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 7 to Feb 21Transplant outside: Apr 11 to Apr 25Sow outdoors: Apr 11 to Apr 25
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 28 to Apr 11
Sow outdoors: Feb 7 to Feb 28Plant for fall: Aug 22 to Sep 12
Sow outdoors: Feb 7 to Feb 28Plant for fall: Sep 19 to Oct 10
Sow outdoors: Feb 14 to Mar 28Plant for fall: Oct 3 to Oct 24
Start indoors: Feb 21 to Feb 28Transplant outside: Apr 4 to Apr 11Sow outdoors: Mar 28 to Apr 11Plant for fall: Aug 29 to Sep 12
Start indoors: Feb 21 to Feb 28Sow outdoors: Mar 28 to Apr 11Plant for fall: Sep 5 to Sep 19
Start indoors: Feb 21 to Feb 28Sow outdoors: Mar 28 to Apr 11
Start indoors: Feb 21 to Feb 28Transplant outside: Apr 4 to Apr 18
Sow outdoors: Feb 28 to Mar 28Plant for fall: Aug 22 to Sep 5
Sow outdoors: Feb 28 to Mar 28Plant for fall: Sep 5 to Sep 19
Sow outdoors: Feb 28 to Mar 21
Sow outdoors: Mar 7 to Apr 4Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 7 to Mar 28Plant for fall: Sep 19 to Oct 10
Sow outdoors: Mar 28 to Apr 18Plant for fall: Aug 29 to Sep 12
Sow outdoors: Mar 28 to Apr 11
Transplant outside: Apr 4 to Apr 25
Plant for fall: Oct 31 to Dec 5
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Broadbent, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 27 – Jan 10 | Feb 21 – Mar 7 | — | — |
| Peppers | Jan 10 – Jan 24 | Apr 4 – Apr 18 | — | — |
| Eggplant | Jan 10 – Jan 24 | Apr 4 – Apr 18 | — | — |
| Tomatoes | Jan 24 – Feb 7 | Mar 28 – Apr 11 | — | — |
| Lettuce | Jan 24 – Feb 7 | Feb 28 – Mar 14 | Feb 21 – Mar 28 | Sep 19 – Oct 17 |
| Kale | Jan 24 – Feb 7 | Feb 21 – Mar 7 | Feb 21 – Mar 7 | Sep 5 – Sep 26 |
| Broccoli | Jan 24 – Feb 7 | Mar 7 – Mar 21 | — | Aug 8 – Aug 29 |
| Cabbage | Jan 24 – Feb 7 | Feb 28 – Mar 14 | — | Aug 8 – Aug 29 |
| Cauliflower | Jan 24 – Feb 7 | Mar 7 – Mar 21 | — | Aug 8 – Aug 29 |
| Okra | Feb 7 – Feb 21 | Apr 11 – Apr 25 | Apr 11 – Apr 25 | — |
| Basil | Feb 7 – Feb 21 | Mar 28 – Apr 11 | — | — |
| Peas | — | — | Feb 7 – Feb 28 | Aug 22 – Sep 12 |
| Spinach | — | — | Feb 7 – Feb 28 | Sep 19 – Oct 10 |
| Radishes | — | — | Feb 14 – Mar 28 | Oct 3 – Oct 24 |
| Cucumbers | Feb 21 – Feb 28 | Apr 4 – Apr 11 | Mar 28 – Apr 11 | Aug 29 – Sep 12 |
| Zucchini & Summer Squash | Feb 21 – Feb 28 | — | Mar 28 – Apr 11 | Sep 5 – Sep 19 |
| Winter Squash & Pumpkins | Feb 21 – Feb 28 | — | Mar 28 – Apr 11 | — |
| Melons & Watermelon | Feb 21 – Feb 28 | Apr 4 – Apr 18 | — | — |
| Carrots | — | — | Feb 28 – Mar 28 | Aug 22 – Sep 5 |
| Beets | — | — | Feb 28 – Mar 28 | Sep 5 – Sep 19 |
| Potatoes | — | — | Feb 28 – Mar 21 | — |
| Swiss Chard | — | — | Mar 7 – Apr 4 | Sep 5 – Sep 19 |
| Cilantro | — | — | Mar 7 – Mar 28 | Sep 19 – Oct 10 |
| Green Beans | — | — | Mar 28 – Apr 18 | Aug 29 – Sep 12 |
| Sweet Corn | — | — | Mar 28 – Apr 11 | — |
| Sweet Potatoes | — | Apr 4 – Apr 25 | — | — |
| Garlic | — | — | — | Oct 31 – Dec 5 |
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 Powers, OR weather station, 11 km away (elevation 230 ft (70 m)).
Frost dates near Broadbent
- Myrtle Point Mar 28 · Nov 6
- Powers Mar 21 · Nov 14
- Coquille Mar 28 · Nov 6
- Bandon Mar 9 · Nov 27
- Coos Bay Mar 28 · Nov 6
- Langlois Mar 16 · Nov 29
- Sixes Feb 17 · Dec 3
- Camas Valley Mar 31 · Nov 6
- Port Orford Feb 17 · Dec 3
- Agness Mar 30 · Nov 17
Frequently asked questions
When is the last frost in Broadbent, OR?
The median last spring frost in Broadbent, OR is March 21. There is still about a 10% chance of frost after April 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Broadbent, OR?
The median first fall frost is November 14, with about a 10% chance of frost before October 21.
How long is the growing season in Broadbent, OR?
About 238 days between the median last spring frost and first fall frost.
What planting zone is Broadbent, OR?
Broadbent, OR is in USDA hardiness zone 9a.