Frost dates for Campbell, 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 2
typical year
Safe to plant
March 14
frost is over in 9 of 10 years
First fall frost
December 6
typical year
Growing season
310 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 5 – 19 | – |
| Spinach | – | Dec 22 – Jan 12 | Oct 11 – 25 |
| Lettuce | – | Jan 5 – 26 | Oct 11 – 25 |
| Radishes | – | Jan 5 – Feb 16 | Oct 25 – Nov 8 |
| Onions | – | Jan 5 – 19 | – |
| Potatoes | – | Jan 12 – 26 | – |
| Carrots | – | Jan 12 – Feb 2 | Sep 13 – 27 |
| Beets | – | Jan 5 – 19 | Sep 27 – Oct 11 |
| Kale | Nov 24 – Dec 8 | Jan 5 – 19 | Sep 27 – Oct 11 |
| Broccoli | Nov 24 – Dec 8 | Jan 19 – Feb 2 | Sep 27 – Oct 11 |
| Cabbage | Nov 10 – 24 | Jan 5 – 19 | Sep 27 – Oct 11 |
| Garlic | – | – | Oct 25 – Nov 15 |
| Warm-season crops | |||
| Tomatoes | Jan 17 – 31 | Mar 14 – 28 | – |
| Peppers | Jan 10 – 24 | Mar 21 – Apr 4 | – |
| Cucumbers | – | Mar 14 – Apr 4 | – |
| Zucchini | – | Mar 14 – Apr 11 | – |
| Pumpkins | – | Mar 14 – Apr 4 | – |
| Green beans | – | Mar 14 – Sep 27 | – |
| Sweet corn | – | Mar 14 – Apr 11 | – |
| Basil | Feb 7 – 21 | Mar 21 – 28 | – |
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 14 | February 2 | December 31 |
| Fall frost before | November 16 | December 6 | January 7 |
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 1 (January 26 in a late year), and the first one in fall around December 19.
Towns that use these dates
This is the nearest NOAA station with frost records for 4 towns.
Campbell, Los Gatos, Saratoga, Monte Sereno
Where these dates come from
NOAA weather station LOS GATOS, CA US (USC00045123), 1991–2020 climate normals. It's the nearest station for 11 zip codes, all within 9 miles:
95008, 95030, 95032, 95033, 95070, 95118, 95119, 95120, 95123, 95124, 95130
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.