Frost dates for Trona, CA
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
February 15
typical year
Safe to plant
March 4
frost is over in 9 of 10 years
First fall frost
November 28
typical year
Growing season
285 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Jan 18 – Feb 1 | – |
| Spinach | – | Jan 4 – 25 | Oct 3 – 17 |
| Lettuce | – | Jan 18 – Feb 8 | Oct 3 – 17 |
| Radishes | – | Jan 18 – Mar 1 | Oct 17 – 31 |
| Onions | – | Jan 18 – Feb 1 | – |
| Potatoes | – | Jan 25 – Feb 8 | – |
| Carrots | – | Jan 25 – Feb 15 | Sep 5 – 19 |
| Beets | – | Jan 18 – Feb 1 | Sep 19 – Oct 3 |
| Kale | Dec 7 – 21 | Jan 18 – Feb 1 | Sep 19 – Oct 3 |
| Broccoli | Dec 7 – 21 | Feb 1 – 15 | Sep 19 – Oct 3 |
| Cabbage | Nov 23 – Dec 7 | Jan 18 – Feb 1 | Sep 19 – Oct 3 |
| Garlic | – | – | Oct 17 – Nov 7 |
| Warm-season crops | |||
| Tomatoes | Jan 7 – 21 | Mar 4 – 18 | – |
| Peppers | Dec 31 – Jan 14 | Mar 11 – 25 | – |
| Cucumbers | – | Mar 4 – 25 | – |
| Zucchini | – | Mar 4 – Apr 1 | – |
| Pumpkins | – | Mar 4 – 25 | – |
| Green beans | – | Mar 4 – Sep 19 | – |
| Sweet corn | – | Mar 4 – Apr 1 | – |
| Basil | Jan 28 – Feb 11 | Mar 11 – 18 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | March 4 | February 15 | January 21 |
| Fall frost before | November 11 | November 28 | December 16 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around January 23 (February 19 in a late year), and the first one in fall around December 10.
Where these dates come from
NOAA weather station TRONA, CA US (USC00049035), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 5 miles:
93562
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.