Tacna, AZ frost dates
Last spring frostFeb 13median date
First fall frostDec 1median date
Growing season291 daysfrost-free
Hardiness zone9bZone 9b
How Tacna compares
- In 8 years out of 10, the last spring frost in Tacna falls between January 19 and March 5, a 45-day window. The first fall frost falls between November 14 and December 17.
- The median last frost is 62 days earlier than the Arizona median of Apr 16.
- Its 291-day growing season is among the longest of the 193 Arizona places with a regular frost season.
- The last frost is 7 days earlier than the zone 9b median of Feb 20. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9b chart.
- The weather station records an average of 22 nights a year at or below 32°F.
- Nearby Yuma, AZ, 54 km away, rarely gets frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 19 |
| 50% (median) | February 13 |
| 10% (safe for tender plants) | March 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 14 |
| 50% (median) | December 1 |
| 90% (late) | December 17 |
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 Tacna, AZ
Tacna, AZ frost dates — last frost Feb 13, first frost Dec 1, zone 9b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Nov 21 to Dec 5Transplant outside: Jan 16 to Jan 30
Start indoors: Dec 5 to Dec 19Transplant outside: Feb 27 to Mar 13
Start indoors: Dec 5 to Dec 19Transplant outside: Feb 27 to Mar 13
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Feb 20 to Mar 6
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 23 to Feb 6Sow outdoors: Jan 16 to Feb 20Plant for fall: Oct 6 to Nov 3
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 16 to Jan 30Sow outdoors: Jan 16 to Jan 30Plant for fall: Sep 22 to Oct 13
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 30 to Feb 13Plant for fall: Aug 25 to Sep 15
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 23 to Feb 6Plant for fall: Aug 25 to Sep 15
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Jan 30 to Feb 13Plant for fall: Aug 25 to Sep 15
Start indoors: Jan 2 to Jan 16Transplant outside: Mar 6 to Mar 20Sow outdoors: Mar 6 to Mar 20
Start indoors: Jan 2 to Jan 16Transplant outside: Feb 20 to Mar 6
Sow outdoors: Jan 2 to Jan 23Plant for fall: Sep 8 to Sep 29
Sow outdoors: Jan 2 to Jan 23Plant for fall: Oct 6 to Oct 27
Sow outdoors: Jan 9 to Feb 20Plant for fall: Oct 20 to Nov 10
Start indoors: Jan 16 to Jan 23Transplant outside: Feb 27 to Mar 6Sow outdoors: Feb 20 to Mar 6Plant for fall: Sep 15 to Sep 29
Start indoors: Jan 16 to Jan 23Sow outdoors: Feb 20 to Mar 6Plant for fall: Sep 22 to Oct 6
Start indoors: Jan 16 to Jan 23Sow outdoors: Feb 20 to Mar 6
Start indoors: Jan 16 to Jan 23Transplant outside: Feb 27 to Mar 13
Sow outdoors: Jan 23 to Feb 20Plant for fall: Sep 8 to Sep 22
Sow outdoors: Jan 23 to Feb 20Plant for fall: Sep 22 to Oct 6
Sow outdoors: Jan 23 to Feb 13
Sow outdoors: Jan 30 to Feb 27Plant for fall: Sep 22 to Oct 6
Sow outdoors: Jan 30 to Feb 20Plant for fall: Oct 6 to Oct 27
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 15 to Sep 29
Sow outdoors: Feb 20 to Mar 6
Transplant outside: Feb 27 to Mar 20
Plant for fall: Nov 17 to Dec 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Tacna, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 21 – Dec 5 | Jan 16 – Jan 30 | — | — |
| Peppers | Dec 5 – Dec 19 | Feb 27 – Mar 13 | — | — |
| Eggplant | Dec 5 – Dec 19 | Feb 27 – Mar 13 | — | — |
| Tomatoes | Dec 19 – Jan 2 | Feb 20 – Mar 6 | — | — |
| Lettuce | Dec 19 – Jan 2 | Jan 23 – Feb 6 | Jan 16 – Feb 20 | Oct 6 – Nov 3 |
| Kale | Dec 19 – Jan 2 | Jan 16 – Jan 30 | Jan 16 – Jan 30 | Sep 22 – Oct 13 |
| Broccoli | Dec 19 – Jan 2 | Jan 30 – Feb 13 | — | Aug 25 – Sep 15 |
| Cabbage | Dec 19 – Jan 2 | Jan 23 – Feb 6 | — | Aug 25 – Sep 15 |
| Cauliflower | Dec 19 – Jan 2 | Jan 30 – Feb 13 | — | Aug 25 – Sep 15 |
| Okra | Jan 2 – Jan 16 | Mar 6 – Mar 20 | Mar 6 – Mar 20 | — |
| Basil | Jan 2 – Jan 16 | Feb 20 – Mar 6 | — | — |
| Peas | — | — | Jan 2 – Jan 23 | Sep 8 – Sep 29 |
| Spinach | — | — | Jan 2 – Jan 23 | Oct 6 – Oct 27 |
| Radishes | — | — | Jan 9 – Feb 20 | Oct 20 – Nov 10 |
| Cucumbers | Jan 16 – Jan 23 | Feb 27 – Mar 6 | Feb 20 – Mar 6 | Sep 15 – Sep 29 |
| Zucchini & Summer Squash | Jan 16 – Jan 23 | — | Feb 20 – Mar 6 | Sep 22 – Oct 6 |
| Winter Squash & Pumpkins | Jan 16 – Jan 23 | — | Feb 20 – Mar 6 | — |
| Melons & Watermelon | Jan 16 – Jan 23 | Feb 27 – Mar 13 | — | — |
| Carrots | — | — | Jan 23 – Feb 20 | Sep 8 – Sep 22 |
| Beets | — | — | Jan 23 – Feb 20 | Sep 22 – Oct 6 |
| Potatoes | — | — | Jan 23 – Feb 13 | — |
| Swiss Chard | — | — | Jan 30 – Feb 27 | Sep 22 – Oct 6 |
| Cilantro | — | — | Jan 30 – Feb 20 | Oct 6 – Oct 27 |
| Green Beans | — | — | Feb 20 – Mar 13 | Sep 15 – Sep 29 |
| Sweet Corn | — | — | Feb 20 – Mar 6 | — |
| Sweet Potatoes | — | Feb 27 – Mar 20 | — | — |
| Garlic | — | — | — | Nov 17 – Dec 22 |
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 Tacna 3 Ne, AZ weather station, 6 km away (elevation 325 ft (99 m)).
Frost dates near Tacna
- Roll Feb 13 · Dec 1
- Wellton Jan 11 · Dec 21
- Dateland Jan 25 · Dec 13
- Yuma rare frost
- Somerton rare frost
- Gadsden rare frost
- San Luis rare frost
- Cibola Jan 25 · Dec 12
- Quartzsite Jan 28 · Dec 6
- Ehrenberg Jan 4 · Dec 19
Frequently asked questions
When is the last frost in Tacna, AZ?
The median last spring frost in Tacna, AZ is February 13. There is still about a 10% chance of frost after March 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Tacna, AZ?
The median first fall frost is December 1, with about a 10% chance of frost before November 14.
How long is the growing season in Tacna, AZ?
About 291 days between the median last spring frost and first fall frost.
What planting zone is Tacna, AZ?
Tacna, AZ is in USDA hardiness zone 9b.