Ash Fork, AZ frost dates
Last spring frostMay 22median date
First fall frostOct 5median date
Growing season136 daysfrost-free
Hardiness zone7aZone 7a
How Ash Fork compares
- In 8 years out of 10, the last spring frost in Ash Fork falls between May 6 and June 10, a 35-day window. The first fall frost falls between September 24 and October 18.
- The median last frost is 36 days later than the Arizona median of Apr 16.
- Its 136-day growing season is longer than 12% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 36 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 150 nights a year at or below 32°F.
- Compared with Flagstaff, AZ, 78 km away, the last frost here is 13 days earlier than there and the growing season is 20 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 6 |
| 50% (median) | May 22 |
| 10% (safe for tender plants) | June 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 24 |
| 50% (median) | October 5 |
| 90% (late) | October 18 |
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 Ash Fork, AZ
Ash Fork, AZ frost dates — last frost May 22, first frost Oct 5, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 27 to Mar 13Transplant outside: Apr 24 to May 8
Start indoors: Mar 13 to Mar 27Transplant outside: Jun 5 to Jun 19
Start indoors: Mar 13 to Mar 27Transplant outside: Jun 5 to Jun 19
Start indoors: Mar 27 to Apr 10Transplant outside: May 29 to Jun 12
Start indoors: Mar 27 to Apr 10Transplant outside: May 1 to May 15Sow outdoors: Apr 24 to May 29Plant for fall: Aug 10 to Sep 7
Start indoors: Mar 27 to Apr 10Transplant outside: Apr 24 to May 8Sow outdoors: Apr 24 to May 8Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 27 to Apr 10Transplant outside: May 8 to May 22Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 27 to Apr 10Transplant outside: May 1 to May 15Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 27 to Apr 10Transplant outside: May 8 to May 22Plant for fall: Jun 29 to Jul 20
Start indoors: Apr 10 to Apr 24Transplant outside: Jun 12 to Jun 26Sow outdoors: Jun 12 to Jun 26
Start indoors: Apr 10 to Apr 24Transplant outside: May 29 to Jun 12
Sow outdoors: Apr 10 to May 1Plant for fall: Jul 13 to Aug 3
Sow outdoors: Apr 10 to May 1Plant for fall: Aug 10 to Aug 31
Sow outdoors: Apr 17 to May 29Plant for fall: Aug 24 to Sep 14
Start indoors: Apr 24 to May 1Transplant outside: Jun 5 to Jun 12Sow outdoors: May 29 to Jun 12Plant for fall: Jul 20 to Aug 3
Start indoors: Apr 24 to May 1Sow outdoors: May 29 to Jun 12Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 24 to May 1Sow outdoors: May 29 to Jun 12
Start indoors: Apr 24 to May 1Transplant outside: Jun 5 to Jun 19
Sow outdoors: May 1 to May 29Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 1 to May 29Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 1 to May 22
Sow outdoors: May 8 to Jun 5Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 8 to May 29Plant for fall: Aug 10 to Aug 31
Sow outdoors: May 29 to Jun 19Plant for fall: Jul 20 to Aug 3
Sow outdoors: May 29 to Jun 12
Transplant outside: Jun 5 to Jun 26
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ash Fork, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 27 – Mar 13 | Apr 24 – May 8 | — | — |
| Peppers | Mar 13 – Mar 27 | Jun 5 – Jun 19 | — | — |
| Eggplant | Mar 13 – Mar 27 | Jun 5 – Jun 19 | — | — |
| Tomatoes | Mar 27 – Apr 10 | May 29 – Jun 12 | — | — |
| Lettuce | Mar 27 – Apr 10 | May 1 – May 15 | Apr 24 – May 29 | Aug 10 – Sep 7 |
| Kale | Mar 27 – Apr 10 | Apr 24 – May 8 | Apr 24 – May 8 | Jul 27 – Aug 17 |
| Broccoli | Mar 27 – Apr 10 | May 8 – May 22 | — | Jun 29 – Jul 20 |
| Cabbage | Mar 27 – Apr 10 | May 1 – May 15 | — | Jun 29 – Jul 20 |
| Cauliflower | Mar 27 – Apr 10 | May 8 – May 22 | — | Jun 29 – Jul 20 |
| Okra | Apr 10 – Apr 24 | Jun 12 – Jun 26 | Jun 12 – Jun 26 | — |
| Basil | Apr 10 – Apr 24 | May 29 – Jun 12 | — | — |
| Peas | — | — | Apr 10 – May 1 | Jul 13 – Aug 3 |
| Spinach | — | — | Apr 10 – May 1 | Aug 10 – Aug 31 |
| Radishes | — | — | Apr 17 – May 29 | Aug 24 – Sep 14 |
| Cucumbers | Apr 24 – May 1 | Jun 5 – Jun 12 | May 29 – Jun 12 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | Apr 24 – May 1 | — | May 29 – Jun 12 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | Apr 24 – May 1 | — | May 29 – Jun 12 | — |
| Melons & Watermelon | Apr 24 – May 1 | Jun 5 – Jun 19 | — | — |
| Carrots | — | — | May 1 – May 29 | Jul 13 – Jul 27 |
| Beets | — | — | May 1 – May 29 | Jul 27 – Aug 10 |
| Potatoes | — | — | May 1 – May 22 | — |
| Swiss Chard | — | — | May 8 – Jun 5 | Jul 27 – Aug 10 |
| Cilantro | — | — | May 8 – May 29 | Aug 10 – Aug 31 |
| Green Beans | — | — | May 29 – Jun 19 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | May 29 – Jun 12 | — |
| Sweet Potatoes | — | Jun 5 – Jun 26 | — | — |
| Garlic | — | — | — | Sep 21 – Oct 26 |
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 Williams, AZ weather station, 28 km away (elevation 6,909 ft (2,106 m)).
Frost dates near Ash Fork
- Paulden May 24 · Oct 7
- Seligman May 10 · Oct 15
- Williams May 9 · Oct 19
- Chino Valley Apr 27 · Oct 24
- Parks Jun 21 · Sep 17
- Sedona (Yavapai) Apr 20 · Oct 27
- Prescott (Yavapai) May 24 · Oct 7
- Bellemont Jun 21 · Sep 17
- Jerome Mar 26 · Nov 25
- Clarkdale Mar 30 · Nov 10
Frequently asked questions
When is the last frost in Ash Fork, AZ?
The median last spring frost in Ash Fork, AZ is May 22. There is still about a 10% chance of frost after June 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ash Fork, AZ?
The median first fall frost is October 5, with about a 10% chance of frost before September 24.
How long is the growing season in Ash Fork, AZ?
About 136 days between the median last spring frost and first fall frost.
What planting zone is Ash Fork, AZ?
Ash Fork, AZ is in USDA hardiness zone 7a.