Agness, OR frost dates
Last spring frostMar 30median date
First fall frostNov 17median date
Growing season232 daysfrost-free
Hardiness zone9aZone 9a
How Agness compares
- In 8 years out of 10, the last spring frost in Agness falls between February 20 and May 2, a 71-day window. The first fall frost falls between October 20 and December 15.
- The median last frost is 17 days earlier than the Oregon median of Apr 16.
- Its 232-day growing season is longer than 78% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 27 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 19 nights a year at or below 32°F.
- Compared with Medford, OR, 102 km away, the last frost here is 9 days earlier than there and the growing season is 28 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 20 |
| 50% (median) | March 30 |
| 10% (safe for tender plants) | May 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 20 |
| 50% (median) | November 17 |
| 90% (late) | December 15 |
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 Agness, OR
Agness, OR frost dates — last frost Mar 30, first frost Nov 17, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Jan 5 to Jan 19Transplant outside: Mar 2 to Mar 16
Start indoors: Jan 19 to Feb 2Transplant outside: Apr 13 to Apr 27
Start indoors: Jan 19 to Feb 2Transplant outside: Apr 13 to Apr 27
Start indoors: Feb 2 to Feb 16Transplant outside: Apr 6 to Apr 20
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 9 to Mar 23Sow outdoors: Mar 2 to Apr 6Plant for fall: Sep 22 to Oct 20
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 2 to Mar 16Sow outdoors: Mar 2 to Mar 16Plant for fall: Sep 8 to Sep 29
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 16 to Mar 30Plant for fall: Aug 11 to Sep 1
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 9 to Mar 23Plant for fall: Aug 11 to Sep 1
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 16 to Mar 30Plant for fall: Aug 11 to Sep 1
Start indoors: Feb 16 to Mar 2Transplant outside: Apr 20 to May 4Sow outdoors: Apr 20 to May 4
Start indoors: Feb 16 to Mar 2Transplant outside: Apr 6 to Apr 20
Sow outdoors: Feb 16 to Mar 9Plant for fall: Aug 25 to Sep 15
Sow outdoors: Feb 16 to Mar 9Plant for fall: Sep 22 to Oct 13
Sow outdoors: Feb 23 to Apr 6Plant for fall: Oct 6 to Oct 27
Start indoors: Mar 2 to Mar 9Transplant outside: Apr 13 to Apr 20Sow outdoors: Apr 6 to Apr 20Plant for fall: Sep 1 to Sep 15
Start indoors: Mar 2 to Mar 9Sow outdoors: Apr 6 to Apr 20Plant for fall: Sep 8 to Sep 22
Start indoors: Mar 2 to Mar 9Sow outdoors: Apr 6 to Apr 20
Start indoors: Mar 2 to Mar 9Transplant outside: Apr 13 to Apr 27
Sow outdoors: Mar 9 to Apr 6Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 9 to Apr 6Plant for fall: Sep 8 to Sep 22
Sow outdoors: Mar 9 to Mar 30
Sow outdoors: Mar 16 to Apr 13Plant for fall: Sep 8 to Sep 22
Sow outdoors: Mar 16 to Apr 6Plant for fall: Sep 22 to Oct 13
Sow outdoors: Apr 6 to Apr 27Plant for fall: Sep 1 to Sep 15
Sow outdoors: Apr 6 to Apr 20
Transplant outside: Apr 13 to May 4
Plant for fall: Nov 3 to Dec 8
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Agness, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 5 – Jan 19 | Mar 2 – Mar 16 | — | — |
| Peppers | Jan 19 – Feb 2 | Apr 13 – Apr 27 | — | — |
| Eggplant | Jan 19 – Feb 2 | Apr 13 – Apr 27 | — | — |
| Tomatoes | Feb 2 – Feb 16 | Apr 6 – Apr 20 | — | — |
| Lettuce | Feb 2 – Feb 16 | Mar 9 – Mar 23 | Mar 2 – Apr 6 | Sep 22 – Oct 20 |
| Kale | Feb 2 – Feb 16 | Mar 2 – Mar 16 | Mar 2 – Mar 16 | Sep 8 – Sep 29 |
| Broccoli | Feb 2 – Feb 16 | Mar 16 – Mar 30 | — | Aug 11 – Sep 1 |
| Cabbage | Feb 2 – Feb 16 | Mar 9 – Mar 23 | — | Aug 11 – Sep 1 |
| Cauliflower | Feb 2 – Feb 16 | Mar 16 – Mar 30 | — | Aug 11 – Sep 1 |
| Okra | Feb 16 – Mar 2 | Apr 20 – May 4 | Apr 20 – May 4 | — |
| Basil | Feb 16 – Mar 2 | Apr 6 – Apr 20 | — | — |
| Peas | — | — | Feb 16 – Mar 9 | Aug 25 – Sep 15 |
| Spinach | — | — | Feb 16 – Mar 9 | Sep 22 – Oct 13 |
| Radishes | — | — | Feb 23 – Apr 6 | Oct 6 – Oct 27 |
| Cucumbers | Mar 2 – Mar 9 | Apr 13 – Apr 20 | Apr 6 – Apr 20 | Sep 1 – Sep 15 |
| Zucchini & Summer Squash | Mar 2 – Mar 9 | — | Apr 6 – Apr 20 | Sep 8 – Sep 22 |
| Winter Squash & Pumpkins | Mar 2 – Mar 9 | — | Apr 6 – Apr 20 | — |
| Melons & Watermelon | Mar 2 – Mar 9 | Apr 13 – Apr 27 | — | — |
| Carrots | — | — | Mar 9 – Apr 6 | Aug 25 – Sep 8 |
| Beets | — | — | Mar 9 – Apr 6 | Sep 8 – Sep 22 |
| Potatoes | — | — | Mar 9 – Mar 30 | — |
| Swiss Chard | — | — | Mar 16 – Apr 13 | Sep 8 – Sep 22 |
| Cilantro | — | — | Mar 16 – Apr 6 | Sep 22 – Oct 13 |
| Green Beans | — | — | Apr 6 – Apr 27 | Sep 1 – Sep 15 |
| Sweet Corn | — | — | Apr 6 – Apr 20 | — |
| Sweet Potatoes | — | Apr 13 – May 4 | — | — |
| Garlic | — | — | — | Nov 3 – Dec 8 |
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 Illahe, OR weather station, 6 km away (elevation 348 ft (106 m)).
Frost dates near Agness
- Ophir Feb 16 · Dec 16
- Wedderburn Feb 17 · Dec 3
- Powers Mar 21 · Nov 14
- Gold Beach Feb 16 · Dec 16
- Port Orford Feb 17 · Dec 3
- Sixes Feb 17 · Dec 3
- Broadbent Mar 21 · Nov 14
- Wilderville Apr 8 · Oct 28
- Langlois Mar 16 · Nov 29
- Merlin May 16 · Oct 30
Frequently asked questions
When is the last frost in Agness, OR?
The median last spring frost in Agness, OR is March 30. There is still about a 10% chance of frost after May 2, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Agness, OR?
The median first fall frost is November 17, with about a 10% chance of frost before October 20.
How long is the growing season in Agness, OR?
About 232 days between the median last spring frost and first fall frost.
What planting zone is Agness, OR?
Agness, OR is in USDA hardiness zone 9a.