Frost dates for 93592 — Trona, CA
Last spring frostFeb 15median date
First fall frostNov 28median date
Growing season286 daysfrost-free
Hardiness zone9aZone 9a
How Trona compares
- In 8 years out of 10, the last spring frost in Trona falls between January 21 and March 4, a 42-day window. The first fall frost falls between November 11 and December 16.
- The median last frost is 44 days earlier than the California median of Mar 31.
- Its 286-day growing season is longer than 88% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 16 days earlier 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 26 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 21 |
| 50% (median) | February 15 |
| 10% (safe for tender plants) | March 4 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 11 |
| 50% (median) | November 28 |
| 90% (late) | December 16 |
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 Trona, CA
Frost dates for 93592 — Trona, CA — last frost Feb 15, first frost Nov 28, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Nov 23 to Dec 7Transplant outside: Jan 18 to Feb 1
Start indoors: Dec 7 to Dec 21Transplant outside: Mar 1 to Mar 15
Start indoors: Dec 7 to Dec 21Transplant outside: Mar 1 to Mar 15
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 22 to Mar 8
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 25 to Feb 8Sow outdoors: Jan 18 to Feb 22Plant for fall: Oct 3 to Oct 31
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 18 to Feb 1Sow outdoors: Jan 18 to Feb 1Plant for fall: Sep 19 to Oct 10
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 1 to Feb 15Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Jan 25 to Feb 8Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Feb 1 to Feb 15Plant for fall: Aug 22 to Sep 12
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 8 to Mar 22Sow outdoors: Mar 8 to Mar 22
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 22 to Mar 8
Sow outdoors: Jan 4 to Jan 25Plant for fall: Sep 5 to Sep 26
Sow outdoors: Jan 4 to Jan 25Plant for fall: Oct 3 to Oct 24
Sow outdoors: Jan 11 to Feb 22Plant for fall: Oct 17 to Nov 7
Start indoors: Jan 18 to Jan 25Transplant outside: Mar 1 to Mar 8Sow outdoors: Feb 22 to Mar 8Plant for fall: Sep 12 to Sep 26
Start indoors: Jan 18 to Jan 25Sow outdoors: Feb 22 to Mar 8Plant for fall: Sep 19 to Oct 3
Start indoors: Jan 18 to Jan 25Sow outdoors: Feb 22 to Mar 8
Start indoors: Jan 18 to Jan 25Transplant outside: Mar 1 to Mar 15
Sow outdoors: Jan 25 to Feb 22Plant for fall: Sep 5 to Sep 19
Sow outdoors: Jan 25 to Feb 22Plant for fall: Sep 19 to Oct 3
Sow outdoors: Jan 25 to Feb 15
Sow outdoors: Feb 1 to Mar 1Plant for fall: Sep 19 to Oct 3
Sow outdoors: Feb 1 to Feb 22Plant for fall: Oct 3 to Oct 24
Sow outdoors: Feb 22 to Mar 15Plant for fall: Sep 12 to Sep 26
Sow outdoors: Feb 22 to Mar 8
Transplant outside: Mar 1 to Mar 22
Plant for fall: Nov 14 to Dec 19
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Trona, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 23 – Dec 7 | Jan 18 – Feb 1 | — | — |
| Peppers | Dec 7 – Dec 21 | Mar 1 – Mar 15 | — | — |
| Eggplant | Dec 7 – Dec 21 | Mar 1 – Mar 15 | — | — |
| Tomatoes | Dec 21 – Jan 4 | Feb 22 – Mar 8 | — | — |
| Lettuce | Dec 21 – Jan 4 | Jan 25 – Feb 8 | Jan 18 – Feb 22 | Oct 3 – Oct 31 |
| Kale | Dec 21 – Jan 4 | Jan 18 – Feb 1 | Jan 18 – Feb 1 | Sep 19 – Oct 10 |
| Broccoli | Dec 21 – Jan 4 | Feb 1 – Feb 15 | — | Aug 22 – Sep 12 |
| Cabbage | Dec 21 – Jan 4 | Jan 25 – Feb 8 | — | Aug 22 – Sep 12 |
| Cauliflower | Dec 21 – Jan 4 | Feb 1 – Feb 15 | — | Aug 22 – Sep 12 |
| Okra | Jan 4 – Jan 18 | Mar 8 – Mar 22 | Mar 8 – Mar 22 | — |
| Basil | Jan 4 – Jan 18 | Feb 22 – Mar 8 | — | — |
| Peas | — | — | Jan 4 – Jan 25 | Sep 5 – Sep 26 |
| Spinach | — | — | Jan 4 – Jan 25 | Oct 3 – Oct 24 |
| Radishes | — | — | Jan 11 – Feb 22 | Oct 17 – Nov 7 |
| Cucumbers | Jan 18 – Jan 25 | Mar 1 – Mar 8 | Feb 22 – Mar 8 | Sep 12 – Sep 26 |
| Zucchini & Summer Squash | Jan 18 – Jan 25 | — | Feb 22 – Mar 8 | Sep 19 – Oct 3 |
| Winter Squash & Pumpkins | Jan 18 – Jan 25 | — | Feb 22 – Mar 8 | — |
| Melons & Watermelon | Jan 18 – Jan 25 | Mar 1 – Mar 15 | — | — |
| Carrots | — | — | Jan 25 – Feb 22 | Sep 5 – Sep 19 |
| Beets | — | — | Jan 25 – Feb 22 | Sep 19 – Oct 3 |
| Potatoes | — | — | Jan 25 – Feb 15 | — |
| Swiss Chard | — | — | Feb 1 – Mar 1 | Sep 19 – Oct 3 |
| Cilantro | — | — | Feb 1 – Feb 22 | Oct 3 – Oct 24 |
| Green Beans | — | — | Feb 22 – Mar 15 | Sep 12 – Sep 26 |
| Sweet Corn | — | — | Feb 22 – Mar 8 | — |
| Sweet Potatoes | — | Mar 1 – Mar 22 | — | — |
| Garlic | — | — | — | Nov 14 – Dec 19 |
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 Trona, CA weather station, 2 km away (elevation 1,696 ft (517 m)).
ZIP codes in Trona: 93562 93592
Frost dates near Trona
- Ridgecrest Mar 11 · Nov 12
- Inyokern Mar 9 · Nov 20
- Johannesburg Mar 19 · Nov 25
- Red Mountain Mar 19 · Nov 25
- Little Lake Apr 17 · Nov 1
- Randsburg Mar 19 · Nov 25
- Darwin Apr 17 · Nov 1
- Onyx Apr 5 · Nov 3
Frequently asked questions
When is the last frost in Trona, CA?
The median last spring frost in Trona, CA is February 15. There is still about a 10% chance of frost after March 4, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Trona, CA?
The median first fall frost is November 28, with about a 10% chance of frost before November 11.
How long is the growing season in Trona, CA?
About 286 days between the median last spring frost and first fall frost.
What planting zone is Trona, CA?
Trona, CA is in USDA hardiness zone 9a.