Fulton, CA frost dates
Last spring frostMar 2median date
First fall frostNov 20median date
Growing season263 daysfrost-free
Hardiness zone9aZone 9a
How Fulton compares
- In 8 years out of 10, the last spring frost in Fulton falls between January 27 and April 2, a 65-day window. The first fall frost falls between November 1 and December 10.
- The median last frost is 29 days earlier than the California median of Mar 31.
- Its 263-day growing season is longer than 61% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is typical for zone 9a, where the median is Mar 3.
- The weather station records an average of 31 nights a year at or below 32°F.
- Compared with Santa Rosa, CA, 8 km away, the last frost here is 5 days later than there and the growing season is 16 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 27 |
| 50% (median) | March 2 |
| 10% (safe for tender plants) | April 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 1 |
| 50% (median) | November 20 |
| 90% (late) | December 10 |
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 Fulton, CA
Fulton, CA frost dates — last frost Mar 2, first frost Nov 20, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Dec 8 to Dec 22Transplant outside: Feb 2 to Feb 16
Start indoors: Dec 22 to Jan 5Start indoors: Dec 22 to Jan 5Transplant outside: Mar 16 to Mar 30
Start indoors: Dec 22 to Jan 5Start indoors: Dec 22 to Jan 5Transplant outside: Mar 16 to Mar 30
Start indoors: Jan 5 to Jan 19Transplant outside: Mar 9 to Mar 23
Start indoors: Jan 5 to Jan 19Transplant outside: Feb 9 to Feb 23Sow outdoors: Feb 2 to Mar 9Plant for fall: Sep 25 to Oct 23
Start indoors: Jan 5 to Jan 19Transplant outside: Feb 2 to Feb 16Sow outdoors: Feb 2 to Feb 16Plant for fall: Sep 11 to Oct 2
Start indoors: Jan 5 to Jan 19Transplant outside: Feb 16 to Mar 2Plant for fall: Aug 14 to Sep 4
Start indoors: Jan 5 to Jan 19Transplant outside: Feb 9 to Feb 23Plant for fall: Aug 14 to Sep 4
Start indoors: Jan 5 to Jan 19Transplant outside: Feb 16 to Mar 2Plant for fall: Aug 14 to Sep 4
Start indoors: Jan 19 to Feb 2Transplant outside: Mar 23 to Apr 6Sow outdoors: Mar 23 to Apr 6
Start indoors: Jan 19 to Feb 2Transplant outside: Mar 9 to Mar 23
Sow outdoors: Jan 19 to Feb 9Plant for fall: Aug 28 to Sep 18
Sow outdoors: Jan 19 to Feb 9Plant for fall: Sep 25 to Oct 16
Sow outdoors: Jan 26 to Mar 9Plant for fall: Oct 9 to Oct 30
Start indoors: Feb 2 to Feb 9Transplant outside: Mar 16 to Mar 23Sow outdoors: Mar 9 to Mar 23Plant for fall: Sep 4 to Sep 18
Start indoors: Feb 2 to Feb 9Sow outdoors: Mar 9 to Mar 23Plant for fall: Sep 11 to Sep 25
Start indoors: Feb 2 to Feb 9Sow outdoors: Mar 9 to Mar 23
Start indoors: Feb 2 to Feb 9Transplant outside: Mar 16 to Mar 30
Sow outdoors: Feb 9 to Mar 9Plant for fall: Aug 28 to Sep 11
Sow outdoors: Feb 9 to Mar 9Plant for fall: Sep 11 to Sep 25
Sow outdoors: Feb 9 to Mar 2
Sow outdoors: Feb 16 to Mar 16Plant for fall: Sep 11 to Sep 25
Sow outdoors: Feb 16 to Mar 9Plant for fall: Sep 25 to Oct 16
Sow outdoors: Mar 9 to Mar 30Plant for fall: Sep 4 to Sep 18
Sow outdoors: Mar 9 to Mar 23
Transplant outside: Mar 16 to Apr 6
Plant for fall: Nov 6 to Dec 11
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Fulton, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 8 – Dec 22 | Feb 2 – Feb 16 | — | — |
| Peppers | Dec 22 – Jan 5 | Mar 16 – Mar 30 | — | — |
| Eggplant | Dec 22 – Jan 5 | Mar 16 – Mar 30 | — | — |
| Tomatoes | Jan 5 – Jan 19 | Mar 9 – Mar 23 | — | — |
| Lettuce | Jan 5 – Jan 19 | Feb 9 – Feb 23 | Feb 2 – Mar 9 | Sep 25 – Oct 23 |
| Kale | Jan 5 – Jan 19 | Feb 2 – Feb 16 | Feb 2 – Feb 16 | Sep 11 – Oct 2 |
| Broccoli | Jan 5 – Jan 19 | Feb 16 – Mar 2 | — | Aug 14 – Sep 4 |
| Cabbage | Jan 5 – Jan 19 | Feb 9 – Feb 23 | — | Aug 14 – Sep 4 |
| Cauliflower | Jan 5 – Jan 19 | Feb 16 – Mar 2 | — | Aug 14 – Sep 4 |
| Okra | Jan 19 – Feb 2 | Mar 23 – Apr 6 | Mar 23 – Apr 6 | — |
| Basil | Jan 19 – Feb 2 | Mar 9 – Mar 23 | — | — |
| Peas | — | — | Jan 19 – Feb 9 | Aug 28 – Sep 18 |
| Spinach | — | — | Jan 19 – Feb 9 | Sep 25 – Oct 16 |
| Radishes | — | — | Jan 26 – Mar 9 | Oct 9 – Oct 30 |
| Cucumbers | Feb 2 – Feb 9 | Mar 16 – Mar 23 | Mar 9 – Mar 23 | Sep 4 – Sep 18 |
| Zucchini & Summer Squash | Feb 2 – Feb 9 | — | Mar 9 – Mar 23 | Sep 11 – Sep 25 |
| Winter Squash & Pumpkins | Feb 2 – Feb 9 | — | Mar 9 – Mar 23 | — |
| Melons & Watermelon | Feb 2 – Feb 9 | Mar 16 – Mar 30 | — | — |
| Carrots | — | — | Feb 9 – Mar 9 | Aug 28 – Sep 11 |
| Beets | — | — | Feb 9 – Mar 9 | Sep 11 – Sep 25 |
| Potatoes | — | — | Feb 9 – Mar 2 | — |
| Swiss Chard | — | — | Feb 16 – Mar 16 | Sep 11 – Sep 25 |
| Cilantro | — | — | Feb 16 – Mar 9 | Sep 25 – Oct 16 |
| Green Beans | — | — | Mar 9 – Mar 30 | Sep 4 – Sep 18 |
| Sweet Corn | — | — | Mar 9 – Mar 23 | — |
| Sweet Potatoes | — | Mar 16 – Apr 6 | — | — |
| Garlic | — | — | — | Nov 6 – Dec 11 |
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 Santa Rosa Sonoma Co Ap, CA weather station, 3 km away (elevation 115 ft (35 m)).
Frost dates near Fulton
- Windsor Mar 2 · Nov 20
- Santa Rosa Feb 25 · Dec 1
- Graton Mar 20 · Nov 13
- Forestville Mar 20 · Nov 13
- Sebastopol Mar 20 · Nov 13
- Healdsburg Feb 15 · Dec 2
- Camp Meeker Jan 29 · Dec 30
- Rio Nido Mar 20 · Nov 13
- Rohnert Park Feb 28 · Nov 25
- Guerneville Jan 29 · Dec 30
Frequently asked questions
When is the last frost in Fulton, CA?
The median last spring frost in Fulton, CA is March 2. There is still about a 10% chance of frost after April 2, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Fulton, CA?
The median first fall frost is November 20, with about a 10% chance of frost before November 1.
How long is the growing season in Fulton, CA?
About 263 days between the median last spring frost and first fall frost.
What planting zone is Fulton, CA?
Fulton, CA is in USDA hardiness zone 9a.