Last spring frost
Mar 18
Frost Dates for Poplar Grove, AR
First fall frost
Nov 11
Growing season
238 days
Hardiness zone
8a
In an average year around Poplar Grove, AR, the last spring frost (32°F) is about Mar 18 and the first fall frost is about Nov 11, giving roughly a 238-day growing season. To be safe most years, wait until Mar 1 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 18 | Mar 31 | Mar 14 |
| Freeze (32°F) | Apr 5 | Mar 18 | Mar 1 |
| Hard (28°F) | Mar 22 | Mar 7 | Feb 19 |
| Severe (24°F) | Mar 14 | Feb 25 | Jan 30 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 18 | Apr 10 | Apr 6 | Apr 3 | Mar 31 | Mar 29 | Mar 25 | Mar 20 | Mar 14 |
| 32°F | Apr 5 | Mar 31 | Mar 26 | Mar 22 | Mar 18 | Mar 15 | Mar 12 | Mar 7 | Mar 1 |
| 28°F | Mar 22 | Mar 17 | Mar 14 | Mar 10 | Mar 7 | Mar 4 | Mar 1 | Feb 25 | Feb 19 |
| 24°F | Mar 14 | Mar 7 | Mar 4 | Feb 28 | Feb 25 | Feb 20 | Feb 14 | Feb 6 | Jan 30 |
| 20°F | Mar 5 | Feb 27 | Feb 20 | Feb 14 | Feb 7 | Feb 1 | Jan 28 | Jan 19 | Jan 7 |
| 16°F | Feb 23 | Feb 8 | Feb 2 | Jan 30 | Jan 25 | Jan 20 | Jan 13 | Jan 6 | Dec 29 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 19 | Nov 1 | Nov 15 |
| Freeze (32°F) | Oct 28 | Nov 11 | Dec 1 |
| Hard (28°F) | Nov 6 | Nov 26 | Dec 19 |
| Severe (24°F) | Nov 19 | Dec 11 | Jan 6 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 19 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 15 |
| 32°F | Oct 28 | Nov 1 | Nov 5 | Nov 8 | Nov 11 | Nov 16 | Nov 20 | Nov 25 | Dec 1 |
| 28°F | Nov 6 | Nov 11 | Nov 17 | Nov 21 | Nov 26 | Dec 1 | Dec 4 | Dec 9 | Dec 19 |
| 24°F | Nov 19 | Nov 26 | Dec 1 | Dec 5 | Dec 11 | Dec 17 | Dec 23 | Dec 29 | Jan 6 |
| 20°F | Dec 2 | Dec 11 | Dec 20 | Dec 26 | Dec 31 | Jan 3 | Jan 9 | Jan 16 | Jan 29 |
| 16°F | Dec 14 | Dec 25 | Jan 1 | Jan 4 | Jan 10 | Jan 15 | Jan 19 | Jan 27 | Feb 5 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Marianna 2 S, Ar, about 12.8 miles away@if(!empty($station['elevation_ft'])), at 234 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Poplar Grove, AR?
On average, the last spring frost (32°F) around Poplar Grove, AR is about Mar 18. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 1.
When is the first frost in the fall?
The first fall frost around Poplar Grove, AR typically arrives about Nov 11. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Mar 18 on average, or Mar 1 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 238 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 72374 Planting calendar → Arkansas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026