Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 85193 (Casa Grande, AZ)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Casa Grande, AZ (9 miles away).
- Average last spring frostFeb 550% chance of a 32°F freeze after this date
- Average first fall frostDec 650% chance of a 32°F freeze by this date
- Growing season (frost-free)305 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
76°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Tucson 11 W (56 mi).
4-inch depth
76°F 55°F or warmer
24-hour average · latest 75°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Tucson 11 W (56 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 85193 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 76°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): not yet. Apply as soil cools toward 70°F (typically September to October).
Fertilizer window
Lawn region: Arid Southwest (low desert). Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Mar 23 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
- Lettuce: fall sowing Sep 27–Oct 25
- Lettuce: fall transplant Oct 11–Nov 1
- Spinach: fall sowing Oct 11–Nov 1
- Bok choy / Asian greens: fall sowing Oct 11–25
- Arugula: fall sowing Oct 11–Nov 8
- Mustard greens: fall sowing Oct 11–25
- Cilantro: fall sowing Oct 11–25
- Dill: fall sowing Oct 11–25
- Strawberry (plants): fall transplant Sep 27–Oct 25
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 6: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Jan 5 |
| 50% (the "average" last frost) | Feb 5 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 28 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 18 |
| 50% (the "average" first frost) | Dec 6 |
| 90% (late: most years have frozen by now) | Dec 29 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 26 | Nov 24 |
| 32°F (freeze) | Feb 5 | Dec 6 |
| 28°F (hard freeze) | Jan 14 | Dec 22 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 85193
Dates count from your average last spring frost (Feb 5) and first fall frost (Dec 6). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Dec 11–25 | Feb 12–26 (transplant) | Aug 9–Sep 6 (transplant) |
| Pepper (sweet and hot) | Nov 27–Dec 11 | Feb 19–Mar 5 (transplant) | Aug 16–Sep 6 (transplant) |
| Eggplant | Nov 27–Dec 11 | Feb 19–Mar 5 (transplant) | Aug 16–Sep 6 (transplant) |
| Tomatillo | Dec 11–25 | Feb 12–26 (transplant) | – |
| Lettuce | Dec 11–25 | Jan 15–Feb 5 (transplant) Jan 8–Feb 19 (sow outdoors) | Oct 11–Nov 1 (transplant) Sep 27–Oct 25 (sowing) |
| Spinach | – | Dec 25–Jan 15 (sow outdoors) | Oct 11–Nov 1 (sowing) |
| Kale | Dec 11–25 | Jan 8–22 (transplant) Jan 8–22 (sow outdoors) | Sep 13–Oct 11 (transplant) Aug 30–Sep 27 (sowing) |
| Collards | Dec 11–25 | Jan 8–Feb 5 (transplant) Jan 8–Feb 5 (sow outdoors) | Sep 13–Oct 11 (transplant) Aug 30–Sep 27 (sowing) |
| Broccoli | Nov 27–Dec 11 | Jan 8–22 (transplant) | Aug 30–Sep 27 (transplant) |
| Cabbage | Nov 27–Dec 11 | Jan 8–22 (transplant) | Aug 30–Sep 27 (transplant) |
| Cauliflower | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) | Aug 30–Sep 27 (transplant) |
| Brussels sprouts | Nov 13–27 | Jan 8–22 (transplant) | Aug 16–Sep 6 (transplant) |
| Kohlrabi | Dec 11–25 | Jan 8–22 (transplant) Jan 8–22 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Bok choy / Asian greens | – | Jan 8–22 (sow outdoors) | Oct 11–25 (sowing) |
| Arugula | – | Jan 8–Feb 5 (sow outdoors) | Oct 11–Nov 8 (sowing) |
| Mustard greens | – | Jan 8–29 (sow outdoors) | Oct 11–25 (sowing) |
| Swiss chard | Dec 25–Jan 8 | Jan 22–Feb 12 (transplant) Jan 22–Feb 19 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Beet | – | Jan 8–Feb 5 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Carrot | – | Jan 15–Feb 12 (sow outdoors) | Sep 13–27 (sowing) |
| Radish | – | Jan 1–Feb 12 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Turnip | – | Jan 8–29 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Parsnip | – | Jan 15–Feb 5 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 11–Jan 8 (sow outdoors) | Sep 13–27 (sowing) |
| Onion (bulbing) | Nov 13–27 | Dec 25–Jan 8 (transplant) | – |
| Green onion / scallion | – | Dec 25–Jan 22 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Leek | Nov 13–27 | Jan 8–22 (transplant) | – |
| Garlic | – | – | Oct 25–Nov 22 (sowing) |
| Shallot | – | Dec 25–Jan 8 (transplant) | Oct 25–Nov 22 (sowing) |
| Potato | – | Jan 8–22 (transplant) | Aug 16–30 (transplant) |
| Sweet potato | – | Feb 26–Mar 12 (transplant) | – |
| Sweet corn | – | Feb 12–26 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 12–26 (sow outdoors) | Sep 13–27 (sowing) |
| Bean, pole | – | Feb 12–26 (sow outdoors) | – |
| Lima bean | – | Feb 19–Mar 5 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 26–Mar 19 (sow outdoors) | – |
| Cucumber | Jan 8–15 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | Sep 13–27 (sowing) |
| Summer squash / zucchini | Jan 8–15 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | Sep 13–27 (sowing) |
| Winter squash | Jan 8–15 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | – |
| Pumpkin | – | Feb 12–26 (sow outdoors) | – |
| Watermelon | Jan 8–15 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 8–15 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | – |
| Okra | Dec 25–Jan 8 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | – |
| Celery | Nov 13–27 | Feb 12–19 (transplant) | – |
| Basil | Dec 25–Jan 8 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | – |
| Cilantro | – | Jan 22–Feb 19 (sow outdoors) | Oct 11–25 (sowing) |
| Parsley | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) Jan 15–Feb 5 (sow outdoors) | – |
| Dill | – | Feb 5–19 (sow outdoors) | Oct 11–25 (sowing) |
| Sunflower | – | Feb 5–19 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 8–22 (transplant) | – |
| Rhubarb (crowns) | – | Jan 8–22 (transplant) | – |
| Strawberry (plants) | – | Jan 8–22 (transplant) | Sep 27–Oct 25 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Casa Grande, AZ (NOAA GHCN-Daily ID USC00021306), elevation 1,400 ft, 8.9 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Arizona City, AZ | 10 mi | Feb 28 | Nov 21 |
| Robson Rch, AZ | 12 mi | Feb 7 | Dec 3 |
| Eloy 4 NE, AZ | 19 mi | Feb 24 | Nov 28 |
The average last-frost dates of these stations span 23 days, a rough guide to local variation. See data sources & methods.
Frost questions for 85193
When is the last frost in 85193?
The average (50% chance) last spring freeze of 32°F for ZIP 85193 is February 5. For a more cautious planting date, use February 28, when only 1 year in 10 still sees a later freeze.
When is the first frost in 85193?
The average first fall freeze is December 6. In 1 year in 10 it comes by November 18.
What hardiness zone is 85193?
ZIP 85193 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 85193 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
85122 Casa Grande 85172 Stanfield 85123 Eloy 85194 Casa Grande 85138 Maricopa 85131 Eloy 85147 Sacaton 85128 Coolidge
Other ZIP codes in Pinal County
85118 85119 85120 85121 85122 85123 85128 85131 85132 85137 85138 85139 85140 85141 85142 85143 85145 85147 85172 85173 85191 85192 85194 85618 All Pinal County frost dates · Arizona frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.