Harriet, AR frost dates
Last spring frostApr 11median date
First fall frostOct 26median date
Growing season198 daysfrost-free
Hardiness zone7bZone 7b
How Harriet compares
- In 8 years out of 10, the last spring frost in Harriet falls between March 25 and April 27, a 33-day window. The first fall frost falls between October 10 and November 11.
- The median last frost is 14 days later than the Arkansas median of Mar 28.
- Its 198-day growing season is longer than 7% of the 603 Arkansas places with a regular frost season (state median 222 days).
- The last frost is 6 days later 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 83 nights a year at or below 32°F.
- Compared with Conway, AR, 101 km away, the last frost here is 9 days later than there and the growing season is 16 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 25 |
| 50% (median) | April 11 |
| 10% (safe for tender plants) | April 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 10 |
| 50% (median) | October 26 |
| 90% (late) | November 11 |
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 Harriet, AR
Harriet, AR frost dates — last frost Apr 11, first frost Oct 26, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 17 to Jan 31Transplant outside: Mar 14 to Mar 28
Start indoors: Jan 31 to Feb 14Transplant outside: Apr 25 to May 9
Start indoors: Jan 31 to Feb 14Transplant outside: Apr 25 to May 9
Start indoors: Feb 14 to Feb 28Transplant outside: Apr 18 to May 2
Start indoors: Feb 14 to Feb 28Transplant outside: Mar 21 to Apr 4Sow outdoors: Mar 14 to Apr 18Plant for fall: Aug 31 to Sep 28
Start indoors: Feb 14 to Feb 28Transplant outside: Mar 14 to Mar 28Sow outdoors: Mar 14 to Mar 28Plant for fall: Aug 17 to Sep 7
Start indoors: Feb 14 to Feb 28Transplant outside: Mar 28 to Apr 11Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 14 to Feb 28Transplant outside: Mar 21 to Apr 4Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 14 to Feb 28Transplant outside: Mar 28 to Apr 11Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 28 to Mar 14Transplant outside: May 2 to May 16Sow outdoors: May 2 to May 16
Start indoors: Feb 28 to Mar 14Transplant outside: Apr 18 to May 2
Sow outdoors: Feb 28 to Mar 21Plant for fall: Aug 3 to Aug 24
Sow outdoors: Feb 28 to Mar 21Plant for fall: Aug 31 to Sep 21
Sow outdoors: Mar 7 to Apr 18Plant for fall: Sep 14 to Oct 5
Start indoors: Mar 14 to Mar 21Transplant outside: Apr 25 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Aug 10 to Aug 24
Start indoors: Mar 14 to Mar 21Sow outdoors: Apr 18 to May 2Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 14 to Mar 21Sow outdoors: Apr 18 to May 2
Start indoors: Mar 14 to Mar 21Transplant outside: Apr 25 to May 9
Sow outdoors: Mar 21 to Apr 18Plant for fall: Aug 3 to Aug 17
Sow outdoors: Mar 21 to Apr 18Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 21 to Apr 11
Sow outdoors: Mar 28 to Apr 25Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 28 to Apr 18Plant for fall: Aug 31 to Sep 21
Sow outdoors: Apr 18 to May 9Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 18 to May 2
Transplant outside: Apr 25 to May 16
Plant for fall: Oct 12 to Nov 16
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Harriet, AR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 17 – Jan 31 | Mar 14 – Mar 28 | — | — |
| Peppers | Jan 31 – Feb 14 | Apr 25 – May 9 | — | — |
| Eggplant | Jan 31 – Feb 14 | Apr 25 – May 9 | — | — |
| Tomatoes | Feb 14 – Feb 28 | Apr 18 – May 2 | — | — |
| Lettuce | Feb 14 – Feb 28 | Mar 21 – Apr 4 | Mar 14 – Apr 18 | Aug 31 – Sep 28 |
| Kale | Feb 14 – Feb 28 | Mar 14 – Mar 28 | Mar 14 – Mar 28 | Aug 17 – Sep 7 |
| Broccoli | Feb 14 – Feb 28 | Mar 28 – Apr 11 | — | Jul 20 – Aug 10 |
| Cabbage | Feb 14 – Feb 28 | Mar 21 – Apr 4 | — | Jul 20 – Aug 10 |
| Cauliflower | Feb 14 – Feb 28 | Mar 28 – Apr 11 | — | Jul 20 – Aug 10 |
| Okra | Feb 28 – Mar 14 | May 2 – May 16 | May 2 – May 16 | — |
| Basil | Feb 28 – Mar 14 | Apr 18 – May 2 | — | — |
| Peas | — | — | Feb 28 – Mar 21 | Aug 3 – Aug 24 |
| Spinach | — | — | Feb 28 – Mar 21 | Aug 31 – Sep 21 |
| Radishes | — | — | Mar 7 – Apr 18 | Sep 14 – Oct 5 |
| Cucumbers | Mar 14 – Mar 21 | Apr 25 – May 2 | Apr 18 – May 2 | Aug 10 – Aug 24 |
| Zucchini & Summer Squash | Mar 14 – Mar 21 | — | Apr 18 – May 2 | Aug 17 – Aug 31 |
| Winter Squash & Pumpkins | Mar 14 – Mar 21 | — | Apr 18 – May 2 | — |
| Melons & Watermelon | Mar 14 – Mar 21 | Apr 25 – May 9 | — | — |
| Carrots | — | — | Mar 21 – Apr 18 | Aug 3 – Aug 17 |
| Beets | — | — | Mar 21 – Apr 18 | Aug 17 – Aug 31 |
| Potatoes | — | — | Mar 21 – Apr 11 | — |
| Swiss Chard | — | — | Mar 28 – Apr 25 | Aug 17 – Aug 31 |
| Cilantro | — | — | Mar 28 – Apr 18 | Aug 31 – Sep 21 |
| Green Beans | — | — | Apr 18 – May 9 | Aug 10 – Aug 24 |
| Sweet Corn | — | — | Apr 18 – May 2 | — |
| Sweet Potatoes | — | Apr 25 – May 16 | — | — |
| Garlic | — | — | — | Oct 12 – Nov 16 |
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 Marshall, AR weather station, 17 km away (elevation 951 ft (290 m)).
Frost dates near Harriet
- Big Flat Apr 14 · Oct 28
- Marshall Apr 11 · Oct 26
- Onia Apr 2 · Oct 31
- Gilbert Apr 14 · Oct 22
- Leslie Apr 11 · Oct 26
- Fifty Six Apr 14 · Oct 28
- Saint Joe Apr 14 · Oct 22
- Valley Springs Apr 14 · Oct 22
- Timbo Apr 2 · Oct 31
- Cotter Apr 2 · Nov 1
Frequently asked questions
When is the last frost in Harriet, AR?
The median last spring frost in Harriet, AR is April 11. There is still about a 10% chance of frost after April 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Harriet, AR?
The median first fall frost is October 26, with about a 10% chance of frost before October 10.
How long is the growing season in Harriet, AR?
About 198 days between the median last spring frost and first fall frost.
What planting zone is Harriet, AR?
Harriet, AR is in USDA hardiness zone 7b.