Platina, CA frost dates
Last spring frostMay 3median date
First fall frostOct 11median date
Growing season161 daysfrost-free
Hardiness zone9aZone 9a
How Platina compares
- In 8 years out of 10, the last spring frost in Platina falls between April 16 and May 27, a 41-day window. The first fall frost falls between September 28 and November 1.
- The median last frost is 33 days later than the California median of Mar 31.
- Its 161-day growing season is longer than 18% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 61 days later 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 106 nights a year at or below 32°F.
- Nearby Redding, CA, 56 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 16 |
| 50% (median) | May 3 |
| 10% (safe for tender plants) | May 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 28 |
| 50% (median) | October 11 |
| 90% (late) | November 1 |
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 Platina, CA
Platina, CA frost dates — last frost May 3, first frost Oct 11, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Feb 8 to Feb 22Transplant outside: Apr 5 to Apr 19
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Mar 8 to Mar 22Transplant outside: May 10 to May 24
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 5 to May 10Plant for fall: Aug 16 to Sep 13
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 5 to Apr 19Sow outdoors: Apr 5 to Apr 19Plant for fall: Aug 2 to Aug 23
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 5 to Jul 26
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 5 to Jul 26
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 5 to Jul 26
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7Sow outdoors: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Mar 22 to Apr 12Plant for fall: Jul 19 to Aug 9
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 16 to Sep 6
Sow outdoors: Mar 29 to May 10Plant for fall: Aug 30 to Sep 20
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 24Sow outdoors: May 10 to May 24Plant for fall: Jul 26 to Aug 9
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24Plant for fall: Aug 2 to Aug 16
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Apr 12 to May 10Plant for fall: Jul 19 to Aug 2
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 2 to Aug 16
Sow outdoors: Apr 12 to May 3
Sow outdoors: Apr 19 to May 17Plant for fall: Aug 2 to Aug 16
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 16 to Sep 6
Sow outdoors: May 10 to May 31Plant for fall: Jul 26 to Aug 9
Sow outdoors: May 10 to May 24
Transplant outside: May 17 to Jun 7
Plant for fall: Sep 27 to Nov 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Platina, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 8 – Feb 22 | Apr 5 – Apr 19 | — | — |
| Peppers | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Eggplant | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Tomatoes | Mar 8 – Mar 22 | May 10 – May 24 | — | — |
| Lettuce | Mar 8 – Mar 22 | Apr 12 – Apr 26 | Apr 5 – May 10 | Aug 16 – Sep 13 |
| Kale | Mar 8 – Mar 22 | Apr 5 – Apr 19 | Apr 5 – Apr 19 | Aug 2 – Aug 23 |
| Broccoli | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 5 – Jul 26 |
| Cabbage | Mar 8 – Mar 22 | Apr 12 – Apr 26 | — | Jul 5 – Jul 26 |
| Cauliflower | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 5 – Jul 26 |
| Okra | Mar 22 – Apr 5 | May 24 – Jun 7 | May 24 – Jun 7 | — |
| Basil | Mar 22 – Apr 5 | May 10 – May 24 | — | — |
| Peas | — | — | Mar 22 – Apr 12 | Jul 19 – Aug 9 |
| Spinach | — | — | Mar 22 – Apr 12 | Aug 16 – Sep 6 |
| Radishes | — | — | Mar 29 – May 10 | Aug 30 – Sep 20 |
| Cucumbers | Apr 5 – Apr 12 | May 17 – May 24 | May 10 – May 24 | Jul 26 – Aug 9 |
| Zucchini & Summer Squash | Apr 5 – Apr 12 | — | May 10 – May 24 | Aug 2 – Aug 16 |
| Winter Squash & Pumpkins | Apr 5 – Apr 12 | — | May 10 – May 24 | — |
| Melons & Watermelon | Apr 5 – Apr 12 | May 17 – May 31 | — | — |
| Carrots | — | — | Apr 12 – May 10 | Jul 19 – Aug 2 |
| Beets | — | — | Apr 12 – May 10 | Aug 2 – Aug 16 |
| Potatoes | — | — | Apr 12 – May 3 | — |
| Swiss Chard | — | — | Apr 19 – May 17 | Aug 2 – Aug 16 |
| Cilantro | — | — | Apr 19 – May 10 | Aug 16 – Sep 6 |
| Green Beans | — | — | May 10 – May 31 | Jul 26 – Aug 9 |
| Sweet Corn | — | — | May 10 – May 24 | — |
| Sweet Potatoes | — | May 17 – Jun 7 | — | — |
| Garlic | — | — | — | Sep 27 – Nov 1 |
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 Weaverville, CA weather station, 40 km away (elevation 2,057 ft (627 m)).
Frost dates near Platina
- Igo Feb 13 · Dec 13
- Hayfork Apr 16 · Oct 31
- Douglas City May 3 · Oct 11
- Mad River Mar 4 · Nov 22
- Weaverville May 3 · Oct 11
- Lewiston Apr 23 · Oct 22
- Junction City May 3 · Oct 11
- Zenia Mar 10 · Dec 1
- Whiskeytown Feb 13 · Dec 13
- French Gulch Mar 19 · Nov 22
Frequently asked questions
When is the last frost in Platina, CA?
The median last spring frost in Platina, CA is May 3. There is still about a 10% chance of frost after May 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Platina, CA?
The median first fall frost is October 11, with about a 10% chance of frost before September 28.
How long is the growing season in Platina, CA?
About 161 days between the median last spring frost and first fall frost.
What planting zone is Platina, CA?
Platina, CA is in USDA hardiness zone 9a.