Frost dates for Sandberg, 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
April 15
typical year
Safe to plant
May 9
frost is over in 9 of 10 years
First fall frost
November 26
typical year
Growing season
224 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 | – | Mar 18 – Apr 1 | – |
| Spinach | – | Mar 4 – 25 | Oct 1 – 15 |
| Lettuce | – | Mar 18 – Apr 8 | Oct 1 – 15 |
| Radishes | – | Mar 18 – Apr 29 | Oct 15 – 29 |
| Onions | – | Mar 18 – Apr 1 | – |
| Potatoes | – | Mar 25 – Apr 8 | – |
| Carrots | – | Mar 25 – Apr 15 | Sep 3 – 17 |
| Beets | – | Mar 18 – Apr 1 | Sep 17 – Oct 1 |
| Kale | Feb 4 – 18 | Mar 18 – Apr 1 | Sep 17 – Oct 1 |
| Broccoli | Feb 4 – 18 | Apr 1 – 15 | Sep 17 – Oct 1 |
| Cabbage | Jan 21 – Feb 4 | Mar 18 – Apr 1 | Sep 17 – Oct 1 |
| Garlic | – | – | Oct 15 – Nov 5 |
| Warm-season crops | |||
| Tomatoes | Mar 14 – 28 | May 9 – 23 | – |
| Peppers | Mar 7 – 21 | May 16 – 30 | – |
| Cucumbers | – | May 9 – 30 | – |
| Zucchini | – | May 9 – Jun 6 | – |
| Pumpkins | – | May 9 – 30 | – |
| Green beans | – | May 9 – Sep 17 | – |
| Sweet corn | – | May 9 – Jun 6 | – |
| Basil | Apr 4 – 18 | May 16 – 23 | – |
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 | May 9 | April 15 | March 9 |
| Fall frost before | November 1 | November 26 | 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 March 11 (April 17 in a late year), and the first one in fall around December 12.
Where these dates come from
NOAA weather station SANDBERG, CA US (USW00023187), 1991–2020 climate normals. It's the nearest station for 3 zip codes, all within 18 miles:
93040, 93225, 93243
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.