When to plant in Corona, CA
Planting dates worked out from Corona's own frost records, not a generic zone chart.
Safe to plant out
Mar 11
1 year in 10 has a later frost
Average last frost
Feb 9
about a 50% chance of a later one
Average first fall frost
Dec 8
1 year in 10 by Nov 24
Frost-free days
301
median, 1991–2020
Station used: Chino Ap · 12.4 km away · station 194 m, town 207 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Jan 14 – Jan 28 | Mar 11 – Mar 25 | May 5 |
| Sweet pepper | Dec 31 – Jan 14 | Mar 11 – Mar 25 | May 10 |
| Lettuce (leaf) | Dec 8 – Dec 15 | Jan 12 – Jan 26 | Feb 21 |
| Peas | — | Dec 29 – Jan 26 | Feb 22 |
| Bush beans | — | Mar 4 – Mar 25 | Apr 23 |
| Carrot | — | Jan 19 – Mar 2 | Mar 20 |
| Beet | — | Jan 12 – Feb 23 | Mar 3 |
| Potato | — | Jan 19 – Feb 9 | Mar 30 |
| Kale | Dec 1 – Dec 15 | Jan 12 – Jan 26 | Feb 24 |
| Broccoli | Dec 1 – Dec 15 | Jan 12 – Feb 2 | Mar 13 |
| Cucumber | Feb 11 – Feb 18 | Mar 11 – Mar 25 | Apr 30 |
| Summer squash and zucchini | Feb 11 – Feb 18 | Mar 11 – Mar 25 | Apr 25 |
| Winter squash | Feb 11 – Feb 18 | Mar 11 – Mar 25 | May 30 |
| Sweet corn | — | Mar 4 – Mar 25 | May 3 |
| Onion (from sets) | — | Jan 12 – Feb 2 | Apr 12 |
| Garlic | — | Nov 24 – Dec 22 (fall) | following summer |
| Spinach | — | Dec 29 – Jan 26 | Feb 5 |
| Basil | Jan 28 – Feb 11 | Mar 11 – Mar 25 | May 7 |
Corona's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 1999 | Apr 10 |
| 2000 | Jan 9 |
| 2001 | Feb 9 |
| 2002 | Mar 17 |
| 2003 | Feb 7 |
| 2004 | Feb 13 |
| 2006 | Mar 12 |
| 2007 | Mar 2 |
| 2008 | Feb 16 |
| 2009 | Feb 10 |
| 2010 | Jan 5 |
| 2011 | Feb 28 |
| 2012 | Feb 16 |
| 2013 | Feb 26 |
| 2015 | Jan 4 |
| 2016 | Feb 2 |
| 2018 | Feb 24 |
| 2019 | Feb 23 |
| 2020 | Feb 5 |
| 2022 | Feb 26 |
| 2023 | Mar 2 |
| 2024 | Jan 12 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1999 | 226 |
| 2000 | 306 |
| 2001 | 302 |
| 2002 | 288 |
| 2003 | 307 |
| 2004 | 288 |
| 2005 | 330 |
| 2006 | 261 |
| 2007 | 282 |
| 2008 | 300 |
| 2009 | 300 |
| 2010 | 324 |
| 2011 | 278 |
| 2012 | 267 |
| 2013 | 284 |
| 2014 | 358 |
| 2015 | 327 |
| 2016 | 318 |
| 2017 | 354 |
| 2018 | 309 |
| 2019 | 297 |
| 2020 | 328 |
| 2021 | 363 |
| 2022 | 307 |
| 2023 | 303 |
| 2024 | 308 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1999 | 19.8 °C |
| 2000 | 21.6 °C |
| 2001 | 20.8 °C |
| 2002 | 21.1 °C |
| 2003 | 21.3 °C |
| 2004 | 21.7 °C |
| 2005 | 21.1 °C |
| 2006 | 22.5 °C |
| 2007 | 22.1 °C |
| 2008 | 22.2 °C |
| 2009 | 22.5 °C |
| 2010 | 20.7 °C |
| 2011 | 21.3 °C |
| 2012 | 22.7 °C |
| 2013 | 22.4 °C |
| 2014 | 22.8 °C |
| 2015 | 23.4 °C |
| 2016 | 23.4 °C |
| 2017 | 23.7 °C |
| 2018 | 23.9 °C |
| 2019 | 21.8 °C |
| 2020 | 24.5 °C |
| 2021 | 23.4 °C |
| 2022 | 24.4 °C |
| 2023 | 21.7 °C |
| 2024 | 22.3 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Chino Ap (NOAA GHCN-Daily). Years with too many missing days are left out.