Hayden, AZ frost dates
Last spring frostMar 13median date
First fall frostNov 19median date
Growing season251 daysfrost-free
Hardiness zone9aZone 9a
How Hayden compares
- In 8 years out of 10, the last spring frost in Hayden falls between February 17 and April 6, a 48-day window. The first fall frost falls between November 3 and December 4.
- The median last frost is 34 days earlier than the Arizona median of Apr 16.
- Its 251-day growing season is longer than 82% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 10 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 42 nights a year at or below 32°F.
- Nearby San Tan Valley, AZ, 72 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) | February 17 |
| 50% (median) | March 13 |
| 10% (safe for tender plants) | April 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 3 |
| 50% (median) | November 19 |
| 90% (late) | December 4 |
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 Hayden, AZ
Hayden, AZ frost dates — last frost Mar 13, first frost Nov 19, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 19 to Jan 2Start indoors: Dec 19 to Jan 2Transplant outside: Feb 13 to Feb 27
Start indoors: Jan 2 to Jan 16Transplant outside: Mar 27 to Apr 10
Start indoors: Jan 2 to Jan 16Transplant outside: Mar 27 to Apr 10
Start indoors: Jan 16 to Jan 30Transplant outside: Mar 20 to Apr 3
Start indoors: Jan 16 to Jan 30Transplant outside: Feb 20 to Mar 6Sow outdoors: Feb 13 to Mar 20Plant for fall: Sep 24 to Oct 22
Start indoors: Jan 16 to Jan 30Transplant outside: Feb 13 to Feb 27Sow outdoors: Feb 13 to Feb 27Plant for fall: Sep 10 to Oct 1
Start indoors: Jan 16 to Jan 30Transplant outside: Feb 27 to Mar 13Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 16 to Jan 30Transplant outside: Feb 20 to Mar 6Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 16 to Jan 30Transplant outside: Feb 27 to Mar 13Plant for fall: Aug 13 to Sep 3
Start indoors: Jan 30 to Feb 13Transplant outside: Apr 3 to Apr 17Sow outdoors: Apr 3 to Apr 17
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 20 to Apr 3
Sow outdoors: Jan 30 to Feb 20Plant for fall: Aug 27 to Sep 17
Sow outdoors: Jan 30 to Feb 20Plant for fall: Sep 24 to Oct 15
Sow outdoors: Feb 6 to Mar 20Plant for fall: Oct 8 to Oct 29
Start indoors: Feb 13 to Feb 20Transplant outside: Mar 27 to Apr 3Sow outdoors: Mar 20 to Apr 3Plant for fall: Sep 3 to Sep 17
Start indoors: Feb 13 to Feb 20Sow outdoors: Mar 20 to Apr 3Plant for fall: Sep 10 to Sep 24
Start indoors: Feb 13 to Feb 20Sow outdoors: Mar 20 to Apr 3
Start indoors: Feb 13 to Feb 20Transplant outside: Mar 27 to Apr 10
Sow outdoors: Feb 20 to Mar 20Plant for fall: Aug 27 to Sep 10
Sow outdoors: Feb 20 to Mar 20Plant for fall: Sep 10 to Sep 24
Sow outdoors: Feb 20 to Mar 13
Sow outdoors: Feb 27 to Mar 27Plant for fall: Sep 10 to Sep 24
Sow outdoors: Feb 27 to Mar 20Plant for fall: Sep 24 to Oct 15
Sow outdoors: Mar 20 to Apr 10Plant for fall: Sep 3 to Sep 17
Sow outdoors: Mar 20 to Apr 3
Transplant outside: Mar 27 to Apr 17
Plant for fall: Nov 5 to Dec 10
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Hayden, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 19 – Jan 2 | Feb 13 – Feb 27 | — | — |
| Peppers | Jan 2 – Jan 16 | Mar 27 – Apr 10 | — | — |
| Eggplant | Jan 2 – Jan 16 | Mar 27 – Apr 10 | — | — |
| Tomatoes | Jan 16 – Jan 30 | Mar 20 – Apr 3 | — | — |
| Lettuce | Jan 16 – Jan 30 | Feb 20 – Mar 6 | Feb 13 – Mar 20 | Sep 24 – Oct 22 |
| Kale | Jan 16 – Jan 30 | Feb 13 – Feb 27 | Feb 13 – Feb 27 | Sep 10 – Oct 1 |
| Broccoli | Jan 16 – Jan 30 | Feb 27 – Mar 13 | — | Aug 13 – Sep 3 |
| Cabbage | Jan 16 – Jan 30 | Feb 20 – Mar 6 | — | Aug 13 – Sep 3 |
| Cauliflower | Jan 16 – Jan 30 | Feb 27 – Mar 13 | — | Aug 13 – Sep 3 |
| Okra | Jan 30 – Feb 13 | Apr 3 – Apr 17 | Apr 3 – Apr 17 | — |
| Basil | Jan 30 – Feb 13 | Mar 20 – Apr 3 | — | — |
| Peas | — | — | Jan 30 – Feb 20 | Aug 27 – Sep 17 |
| Spinach | — | — | Jan 30 – Feb 20 | Sep 24 – Oct 15 |
| Radishes | — | — | Feb 6 – Mar 20 | Oct 8 – Oct 29 |
| Cucumbers | Feb 13 – Feb 20 | Mar 27 – Apr 3 | Mar 20 – Apr 3 | Sep 3 – Sep 17 |
| Zucchini & Summer Squash | Feb 13 – Feb 20 | — | Mar 20 – Apr 3 | Sep 10 – Sep 24 |
| Winter Squash & Pumpkins | Feb 13 – Feb 20 | — | Mar 20 – Apr 3 | — |
| Melons & Watermelon | Feb 13 – Feb 20 | Mar 27 – Apr 10 | — | — |
| Carrots | — | — | Feb 20 – Mar 20 | Aug 27 – Sep 10 |
| Beets | — | — | Feb 20 – Mar 20 | Sep 10 – Sep 24 |
| Potatoes | — | — | Feb 20 – Mar 13 | — |
| Swiss Chard | — | — | Feb 27 – Mar 27 | Sep 10 – Sep 24 |
| Cilantro | — | — | Feb 27 – Mar 20 | Sep 24 – Oct 15 |
| Green Beans | — | — | Mar 20 – Apr 10 | Sep 3 – Sep 17 |
| Sweet Corn | — | — | Mar 20 – Apr 3 | — |
| Sweet Potatoes | — | Mar 27 – Apr 17 | — | — |
| Garlic | — | — | — | Nov 5 – Dec 10 |
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 San Carlos Reservoir, AZ weather station, 31 km away (elevation 2,533 ft (772 m)).
Frost dates near Hayden
- Winkelman Mar 13 · Nov 19
- Kearny Jan 18 · Dec 28
- Mammoth Feb 4 · Dec 8
- Superior Jan 18 · Dec 28
- Globe Mar 11 · Nov 21
- Miami Feb 24 · Dec 1
- Oracle Mar 23 · Nov 22
- Claypool Mar 11 · Nov 21
- Peridot Mar 13 · Nov 19
- San Manuel Feb 4 · Dec 8
Frequently asked questions
When is the last frost in Hayden, AZ?
The median last spring frost in Hayden, AZ is March 13. There is still about a 10% chance of frost after April 6, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Hayden, AZ?
The median first fall frost is November 19, with about a 10% chance of frost before November 3.
How long is the growing season in Hayden, AZ?
About 251 days between the median last spring frost and first fall frost.
What planting zone is Hayden, AZ?
Hayden, AZ is in USDA hardiness zone 9a.