Mangum, OK frost dates
Last spring frostApr 8median date
First fall frostNov 2median date
Growing season208 daysfrost-free
Hardiness zone7bZone 7b
How Mangum compares
- In 8 years out of 10, the last spring frost in Mangum falls between March 21 and April 24, a 34-day window. The first fall frost falls between October 19 and November 16.
- The median last frost is 4 days later than the Oklahoma median of Apr 4.
- Its 208-day growing season is longer than 32% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is typical for zone 7b, where the median is Apr 5.
- The weather station records an average of 89 nights a year at or below 32°F.
- Compared with Lawton, OK, 101 km away, the last frost here is 13 days later than there and the growing season is 18 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 21 |
| 50% (median) | April 8 |
| 10% (safe for tender plants) | April 24 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 19 |
| 50% (median) | November 2 |
| 90% (late) | November 16 |
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 Mangum, OK
Mangum, OK frost dates — last frost Apr 8, first frost Nov 2, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 14 to Jan 28Transplant outside: Mar 11 to Mar 25
Start indoors: Jan 28 to Feb 11Transplant outside: Apr 22 to May 6
Start indoors: Jan 28 to Feb 11Transplant outside: Apr 22 to May 6
Start indoors: Feb 11 to Feb 25Transplant outside: Apr 15 to Apr 29
Start indoors: Feb 11 to Feb 25Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 11 to Apr 15Plant for fall: Sep 7 to Oct 5
Start indoors: Feb 11 to Feb 25Transplant outside: Mar 11 to Mar 25Sow outdoors: Mar 11 to Mar 25Plant for fall: Aug 24 to Sep 14
Start indoors: Feb 11 to Feb 25Transplant outside: Mar 25 to Apr 8Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 11 to Feb 25Transplant outside: Mar 18 to Apr 1Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 11 to Feb 25Transplant outside: Mar 25 to Apr 8Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 25 to Mar 11Transplant outside: Apr 29 to May 13Sow outdoors: Apr 29 to May 13
Start indoors: Feb 25 to Mar 11Transplant outside: Apr 15 to Apr 29
Sow outdoors: Feb 25 to Mar 18Plant for fall: Aug 10 to Aug 31
Sow outdoors: Feb 25 to Mar 18Plant for fall: Sep 7 to Sep 28
Sow outdoors: Mar 4 to Apr 15Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 11 to Mar 18Transplant outside: Apr 22 to Apr 29Sow outdoors: Apr 15 to Apr 29Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 11 to Mar 18Sow outdoors: Apr 15 to Apr 29Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 11 to Mar 18Sow outdoors: Apr 15 to Apr 29
Start indoors: Mar 11 to Mar 18Transplant outside: Apr 22 to May 6
Sow outdoors: Mar 18 to Apr 15Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 18 to Apr 15Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 18 to Apr 8
Sow outdoors: Mar 25 to Apr 22Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 25 to Apr 15Plant for fall: Sep 7 to Sep 28
Sow outdoors: Apr 15 to May 6Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 15 to Apr 29
Transplant outside: Apr 22 to May 13
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mangum, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 14 – Jan 28 | Mar 11 – Mar 25 | — | — |
| Peppers | Jan 28 – Feb 11 | Apr 22 – May 6 | — | — |
| Eggplant | Jan 28 – Feb 11 | Apr 22 – May 6 | — | — |
| Tomatoes | Feb 11 – Feb 25 | Apr 15 – Apr 29 | — | — |
| Lettuce | Feb 11 – Feb 25 | Mar 18 – Apr 1 | Mar 11 – Apr 15 | Sep 7 – Oct 5 |
| Kale | Feb 11 – Feb 25 | Mar 11 – Mar 25 | Mar 11 – Mar 25 | Aug 24 – Sep 14 |
| Broccoli | Feb 11 – Feb 25 | Mar 25 – Apr 8 | — | Jul 27 – Aug 17 |
| Cabbage | Feb 11 – Feb 25 | Mar 18 – Apr 1 | — | Jul 27 – Aug 17 |
| Cauliflower | Feb 11 – Feb 25 | Mar 25 – Apr 8 | — | Jul 27 – Aug 17 |
| Okra | Feb 25 – Mar 11 | Apr 29 – May 13 | Apr 29 – May 13 | — |
| Basil | Feb 25 – Mar 11 | Apr 15 – Apr 29 | — | — |
| Peas | — | — | Feb 25 – Mar 18 | Aug 10 – Aug 31 |
| Spinach | — | — | Feb 25 – Mar 18 | Sep 7 – Sep 28 |
| Radishes | — | — | Mar 4 – Apr 15 | Sep 21 – Oct 12 |
| Cucumbers | Mar 11 – Mar 18 | Apr 22 – Apr 29 | Apr 15 – Apr 29 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 11 – Mar 18 | — | Apr 15 – Apr 29 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 11 – Mar 18 | — | Apr 15 – Apr 29 | — |
| Melons & Watermelon | Mar 11 – Mar 18 | Apr 22 – May 6 | — | — |
| Carrots | — | — | Mar 18 – Apr 15 | Aug 10 – Aug 24 |
| Beets | — | — | Mar 18 – Apr 15 | Aug 24 – Sep 7 |
| Potatoes | — | — | Mar 18 – Apr 8 | — |
| Swiss Chard | — | — | Mar 25 – Apr 22 | Aug 24 – Sep 7 |
| Cilantro | — | — | Mar 25 – Apr 15 | Sep 7 – Sep 28 |
| Green Beans | — | — | Apr 15 – May 6 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 15 – Apr 29 | — |
| Sweet Potatoes | — | Apr 22 – May 13 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
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 Mangum, OK weather station, 4 km away (elevation 1,594 ft (486 m)).
Frost dates near Mangum
- Granite Apr 2 · Nov 3
- Blair Apr 10 · Oct 29
- Willow Apr 8 · Nov 2
- Lone Wolf Apr 2 · Nov 3
- Martha Apr 10 · Oct 29
- Duke Apr 3 · Nov 4
- Altus Apr 5 · Nov 2
- Carter Apr 5 · Nov 2
- Altus Afb Apr 3 · Nov 4
- Hobart Apr 7 · Nov 4
Frequently asked questions
When is the last frost in Mangum, OK?
The median last spring frost in Mangum, OK is April 8. There is still about a 10% chance of frost after April 24, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mangum, OK?
The median first fall frost is November 2, with about a 10% chance of frost before October 19.
How long is the growing season in Mangum, OK?
About 208 days between the median last spring frost and first fall frost.
What planting zone is Mangum, OK?
Mangum, OK is in USDA hardiness zone 7b.