Frost dates for Three Rivers Edison Ph, 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
March 16
typical year
Safe to plant
April 14
frost is over in 9 of 10 years
First fall frost
November 26
typical year
Growing season
249 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 | – | Feb 16 – Mar 2 | – |
| Spinach | – | Feb 2 – 23 | Oct 1 – 15 |
| Lettuce | – | Feb 16 – Mar 9 | Oct 1 – 15 |
| Radishes | – | Feb 16 – Mar 30 | Oct 15 – 29 |
| Onions | – | Feb 16 – Mar 2 | – |
| Potatoes | – | Feb 23 – Mar 9 | – |
| Carrots | – | Feb 23 – Mar 16 | Sep 3 – 17 |
| Beets | – | Feb 16 – Mar 2 | Sep 17 – Oct 1 |
| Kale | Jan 5 – 19 | Feb 16 – Mar 2 | Sep 17 – Oct 1 |
| Broccoli | Jan 5 – 19 | Mar 2 – 16 | Sep 17 – Oct 1 |
| Cabbage | Dec 22 – Jan 5 | Feb 16 – Mar 2 | Sep 17 – Oct 1 |
| Garlic | – | – | Oct 15 – Nov 5 |
| Warm-season crops | |||
| Tomatoes | Feb 17 – Mar 3 | Apr 14 – 28 | – |
| Peppers | Feb 10 – 24 | Apr 21 – May 5 | – |
| Cucumbers | – | Apr 14 – May 5 | – |
| Zucchini | – | Apr 14 – May 12 | – |
| Pumpkins | – | Apr 14 – May 5 | – |
| Green beans | – | Apr 14 – Sep 17 | – |
| Sweet corn | – | Apr 14 – May 12 | – |
| Basil | Mar 10 – 24 | Apr 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 | April 14 | March 16 | February 5 |
| Fall frost before | November 5 | November 26 | December 12 |
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 30 (March 18 in a late year), and the first one in fall around December 11.
Where these dates come from
NOAA weather station THREE RIVERS EDISON PH 1, CA US (USC00048917), 1991–2020 climate normals. It's the nearest station for 3 zip codes, all within 19 miles:
93237, 93265, 93271
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.