Portia, AR frost dates
Last spring frostMar 27median date
First fall frostNov 5median date
Growing season223 daysfrost-free
Hardiness zone7bZone 7b
How Portia compares
- In 8 years out of 10, the last spring frost in Portia falls between March 10 and April 10, a 31-day window. The first fall frost falls between October 22 and November 23.
- The median last frost is 1 day earlier than the Arkansas median of Mar 28.
- Its 223-day growing season is longer than 50% of the 603 Arkansas places with a regular frost season (state median 222 days).
- The last frost is 9 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 Jonesboro, AR, 44 km away, the last frost here is 4 days later than there and the growing season is 8 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 10 |
| 50% (median) | March 27 |
| 10% (safe for tender plants) | April 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 22 |
| 50% (median) | November 5 |
| 90% (late) | November 23 |
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 Portia, AR
Portia, AR frost dates — last frost Mar 27, first frost Nov 5, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 2 to Jan 16Transplant outside: Feb 27 to Mar 13
Start indoors: Jan 16 to Jan 30Transplant outside: Apr 10 to Apr 24
Start indoors: Jan 16 to Jan 30Transplant outside: Apr 10 to Apr 24
Start indoors: Jan 30 to Feb 13Transplant outside: Apr 3 to Apr 17
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 6 to Mar 20Sow outdoors: Feb 27 to Apr 3Plant for fall: Sep 10 to Oct 8
Start indoors: Jan 30 to Feb 13Transplant outside: Feb 27 to Mar 13Sow outdoors: Feb 27 to Mar 13Plant for fall: Aug 27 to Sep 17
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 13 to Mar 27Plant for fall: Jul 30 to Aug 20
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 6 to Mar 20Plant for fall: Jul 30 to Aug 20
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 13 to Mar 27Plant for fall: Jul 30 to Aug 20
Start indoors: Feb 13 to Feb 27Transplant outside: Apr 17 to May 1Sow outdoors: Apr 17 to May 1
Start indoors: Feb 13 to Feb 27Transplant outside: Apr 3 to Apr 17
Sow outdoors: Feb 13 to Mar 6Plant for fall: Aug 13 to Sep 3
Sow outdoors: Feb 13 to Mar 6Plant for fall: Sep 10 to Oct 1
Sow outdoors: Feb 20 to Apr 3Plant for fall: Sep 24 to Oct 15
Start indoors: Feb 27 to Mar 6Transplant outside: Apr 10 to Apr 17Sow outdoors: Apr 3 to Apr 17Plant for fall: Aug 20 to Sep 3
Start indoors: Feb 27 to Mar 6Sow outdoors: Apr 3 to Apr 17Plant for fall: Aug 27 to Sep 10
Start indoors: Feb 27 to Mar 6Sow outdoors: Apr 3 to Apr 17
Start indoors: Feb 27 to Mar 6Transplant outside: Apr 10 to Apr 24
Sow outdoors: Mar 6 to Apr 3Plant for fall: Aug 13 to Aug 27
Sow outdoors: Mar 6 to Apr 3Plant for fall: Aug 27 to Sep 10
Sow outdoors: Mar 6 to Mar 27
Sow outdoors: Mar 13 to Apr 10Plant for fall: Aug 27 to Sep 10
Sow outdoors: Mar 13 to Apr 3Plant for fall: Sep 10 to Oct 1
Sow outdoors: Apr 3 to Apr 24Plant for fall: Aug 20 to Sep 3
Sow outdoors: Apr 3 to Apr 17
Transplant outside: Apr 10 to May 1
Plant for fall: Oct 22 to Nov 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Portia, AR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 2 – Jan 16 | Feb 27 – Mar 13 | — | — |
| Peppers | Jan 16 – Jan 30 | Apr 10 – Apr 24 | — | — |
| Eggplant | Jan 16 – Jan 30 | Apr 10 – Apr 24 | — | — |
| Tomatoes | Jan 30 – Feb 13 | Apr 3 – Apr 17 | — | — |
| Lettuce | Jan 30 – Feb 13 | Mar 6 – Mar 20 | Feb 27 – Apr 3 | Sep 10 – Oct 8 |
| Kale | Jan 30 – Feb 13 | Feb 27 – Mar 13 | Feb 27 – Mar 13 | Aug 27 – Sep 17 |
| Broccoli | Jan 30 – Feb 13 | Mar 13 – Mar 27 | — | Jul 30 – Aug 20 |
| Cabbage | Jan 30 – Feb 13 | Mar 6 – Mar 20 | — | Jul 30 – Aug 20 |
| Cauliflower | Jan 30 – Feb 13 | Mar 13 – Mar 27 | — | Jul 30 – Aug 20 |
| Okra | Feb 13 – Feb 27 | Apr 17 – May 1 | Apr 17 – May 1 | — |
| Basil | Feb 13 – Feb 27 | Apr 3 – Apr 17 | — | — |
| Peas | — | — | Feb 13 – Mar 6 | Aug 13 – Sep 3 |
| Spinach | — | — | Feb 13 – Mar 6 | Sep 10 – Oct 1 |
| Radishes | — | — | Feb 20 – Apr 3 | Sep 24 – Oct 15 |
| Cucumbers | Feb 27 – Mar 6 | Apr 10 – Apr 17 | Apr 3 – Apr 17 | Aug 20 – Sep 3 |
| Zucchini & Summer Squash | Feb 27 – Mar 6 | — | Apr 3 – Apr 17 | Aug 27 – Sep 10 |
| Winter Squash & Pumpkins | Feb 27 – Mar 6 | — | Apr 3 – Apr 17 | — |
| Melons & Watermelon | Feb 27 – Mar 6 | Apr 10 – Apr 24 | — | — |
| Carrots | — | — | Mar 6 – Apr 3 | Aug 13 – Aug 27 |
| Beets | — | — | Mar 6 – Apr 3 | Aug 27 – Sep 10 |
| Potatoes | — | — | Mar 6 – Mar 27 | — |
| Swiss Chard | — | — | Mar 13 – Apr 10 | Aug 27 – Sep 10 |
| Cilantro | — | — | Mar 13 – Apr 3 | Sep 10 – Oct 1 |
| Green Beans | — | — | Apr 3 – Apr 24 | Aug 20 – Sep 3 |
| Sweet Corn | — | — | Apr 3 – Apr 17 | — |
| Sweet Potatoes | — | Apr 10 – May 1 | — | — |
| Garlic | — | — | — | Oct 22 – Nov 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 Alicia 2nne, AR weather station, 17 km away (elevation 259 ft (79 m)).
Frost dates near Portia
- Black Rock Mar 27 · Nov 5
- Powhatan Mar 27 · Nov 5
- Hoxie Mar 27 · Nov 5
- Minturn Mar 27 · Nov 5
- Walnut Ridge Mar 27 · Nov 5
- Alicia Mar 27 · Nov 5
- Imboden Mar 31 · Nov 1
- Smithville Mar 27 · Nov 5
- Sedgwick Mar 27 · Nov 5
- Ravenden Apr 4 · Oct 31
Frequently asked questions
When is the last frost in Portia, AR?
The median last spring frost in Portia, AR is March 27. There is still about a 10% chance of frost after April 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Portia, AR?
The median first fall frost is November 5, with about a 10% chance of frost before October 22.
How long is the growing season in Portia, AR?
About 223 days between the median last spring frost and first fall frost.
What planting zone is Portia, AR?
Portia, AR is in USDA hardiness zone 7b.