Ozone, AR frost dates
Last spring frostMar 25median date
First fall frostNov 10median date
Growing season230 daysfrost-free
Hardiness zone7bZone 7b
How Ozone compares
- In 8 years out of 10, the last spring frost in Ozone falls between March 6 and April 12, a 37-day window. The first fall frost falls between October 28 and November 30.
- The median last frost is 3 days earlier than the Arkansas median of Mar 28.
- Its 230-day growing season is longer than 69% of the 603 Arkansas places with a regular frost season (state median 222 days).
- The last frost is 11 days earlier than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 67 nights a year at or below 32°F.
- Compared with Fayetteville, AR, 83 km away, the last frost here is 10 days earlier than there and the growing season is 20 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 6 |
| 50% (median) | March 25 |
| 10% (safe for tender plants) | April 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 28 |
| 50% (median) | November 10 |
| 90% (late) | November 30 |
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 Ozone, AR
Ozone, AR frost dates — last frost Mar 25, first frost Nov 10, zone 7b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 25 to Mar 11
Start indoors: Jan 14 to Jan 28Transplant outside: Apr 8 to Apr 22
Start indoors: Jan 14 to Jan 28Transplant outside: Apr 8 to Apr 22
Start indoors: Jan 28 to Feb 11Transplant outside: Apr 1 to Apr 15
Start indoors: Jan 28 to Feb 11Transplant outside: Mar 4 to Mar 18Sow outdoors: Feb 25 to Apr 1Plant for fall: Sep 15 to Oct 13
Start indoors: Jan 28 to Feb 11Transplant outside: Feb 25 to Mar 11Sow outdoors: Feb 25 to Mar 11Plant for fall: Sep 1 to Sep 22
Start indoors: Jan 28 to Feb 11Transplant outside: Mar 11 to Mar 25Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 28 to Feb 11Transplant outside: Mar 4 to Mar 18Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 28 to Feb 11Transplant outside: Mar 11 to Mar 25Plant for fall: Aug 4 to Aug 25
Start indoors: Feb 11 to Feb 25Transplant outside: Apr 15 to Apr 29Sow outdoors: Apr 15 to Apr 29
Start indoors: Feb 11 to Feb 25Transplant outside: Apr 1 to Apr 15
Sow outdoors: Feb 11 to Mar 4Plant for fall: Aug 18 to Sep 8
Sow outdoors: Feb 11 to Mar 4Plant for fall: Sep 15 to Oct 6
Sow outdoors: Feb 18 to Apr 1Plant for fall: Sep 29 to Oct 20
Start indoors: Feb 25 to Mar 4Transplant outside: Apr 8 to Apr 15Sow outdoors: Apr 1 to Apr 15Plant for fall: Aug 25 to Sep 8
Start indoors: Feb 25 to Mar 4Sow outdoors: Apr 1 to Apr 15Plant for fall: Sep 1 to Sep 15
Start indoors: Feb 25 to Mar 4Sow outdoors: Apr 1 to Apr 15
Start indoors: Feb 25 to Mar 4Transplant outside: Apr 8 to Apr 22
Sow outdoors: Mar 4 to Apr 1Plant for fall: Aug 18 to Sep 1
Sow outdoors: Mar 4 to Apr 1Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 4 to Mar 25
Sow outdoors: Mar 11 to Apr 8Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 11 to Apr 1Plant for fall: Sep 15 to Oct 6
Sow outdoors: Apr 1 to Apr 22Plant for fall: Aug 25 to Sep 8
Sow outdoors: Apr 1 to Apr 15
Transplant outside: Apr 8 to Apr 29
Plant for fall: Oct 27 to Dec 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ozone, AR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 31 – Jan 14 | Feb 25 – Mar 11 | — | — |
| Peppers | Jan 14 – Jan 28 | Apr 8 – Apr 22 | — | — |
| Eggplant | Jan 14 – Jan 28 | Apr 8 – Apr 22 | — | — |
| Tomatoes | Jan 28 – Feb 11 | Apr 1 – Apr 15 | — | — |
| Lettuce | Jan 28 – Feb 11 | Mar 4 – Mar 18 | Feb 25 – Apr 1 | Sep 15 – Oct 13 |
| Kale | Jan 28 – Feb 11 | Feb 25 – Mar 11 | Feb 25 – Mar 11 | Sep 1 – Sep 22 |
| Broccoli | Jan 28 – Feb 11 | Mar 11 – Mar 25 | — | Aug 4 – Aug 25 |
| Cabbage | Jan 28 – Feb 11 | Mar 4 – Mar 18 | — | Aug 4 – Aug 25 |
| Cauliflower | Jan 28 – Feb 11 | Mar 11 – Mar 25 | — | Aug 4 – Aug 25 |
| Okra | Feb 11 – Feb 25 | Apr 15 – Apr 29 | Apr 15 – Apr 29 | — |
| Basil | Feb 11 – Feb 25 | Apr 1 – Apr 15 | — | — |
| Peas | — | — | Feb 11 – Mar 4 | Aug 18 – Sep 8 |
| Spinach | — | — | Feb 11 – Mar 4 | Sep 15 – Oct 6 |
| Radishes | — | — | Feb 18 – Apr 1 | Sep 29 – Oct 20 |
| Cucumbers | Feb 25 – Mar 4 | Apr 8 – Apr 15 | Apr 1 – Apr 15 | Aug 25 – Sep 8 |
| Zucchini & Summer Squash | Feb 25 – Mar 4 | — | Apr 1 – Apr 15 | Sep 1 – Sep 15 |
| Winter Squash & Pumpkins | Feb 25 – Mar 4 | — | Apr 1 – Apr 15 | — |
| Melons & Watermelon | Feb 25 – Mar 4 | Apr 8 – Apr 22 | — | — |
| Carrots | — | — | Mar 4 – Apr 1 | Aug 18 – Sep 1 |
| Beets | — | — | Mar 4 – Apr 1 | Sep 1 – Sep 15 |
| Potatoes | — | — | Mar 4 – Mar 25 | — |
| Swiss Chard | — | — | Mar 11 – Apr 8 | Sep 1 – Sep 15 |
| Cilantro | — | — | Mar 11 – Apr 1 | Sep 15 – Oct 6 |
| Green Beans | — | — | Apr 1 – Apr 22 | Aug 25 – Sep 8 |
| Sweet Corn | — | — | Apr 1 – Apr 15 | — |
| Sweet Potatoes | — | Apr 8 – Apr 29 | — | — |
| Garlic | — | — | — | Oct 27 – Dec 1 |
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 Clarksville 6 Ne, AR weather station, 14 km away (elevation 850 ft (259 m)).
Frost dates near Ozone
- Oark Mar 25 · Nov 10
- Hagarville Mar 25 · Nov 10
- Clarksville Mar 24 · Nov 10
- Deer Apr 7 · Nov 4
- Lamar Mar 25 · Nov 10
- Pettigrew Apr 13 · Oct 29
- Hartman Mar 24 · Nov 10
- Knoxville Mar 24 · Nov 10
- Coal Hill Mar 28 · Nov 5
- London Apr 1 · Nov 2
Frequently asked questions
When is the last frost in Ozone, AR?
The median last spring frost in Ozone, AR is March 25. There is still about a 10% chance of frost after April 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ozone, AR?
The median first fall frost is November 10, with about a 10% chance of frost before October 28.
How long is the growing season in Ozone, AR?
About 230 days between the median last spring frost and first fall frost.
What planting zone is Ozone, AR?
Ozone, AR is in USDA hardiness zone 7b.