Fort Smith, Arkansas planting calendar and frost dates
Fort Smith is in USDA hardiness zone 8a. The last spring frost typically comes around March 25 and the first fall frost around November 6, giving about 224 frost-free days a year.
- Hardiness zone
- Zone 8a
- Typical last frost
- March 25
- Typical first frost
- November 6
- Frost-free season
- 224 days
Frost dates in Fort Smith
Last spring frost
- March 4Risky: frost later than this in 9 years out of 10
- March 25Typical: a later frost in half of years
- April 11Safe: a later frost only 1 year in 10
First fall frost
- October 23Risky: frost earlier than this 1 year in 10
- November 6Typical: an earlier frost in half of years
- November 21Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 224 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around March 11 and returns around November 17.
NOAA U.S. Climate Normals 1991-2020 for Ft Smith Rgnl Airport, 4.2 miles SSE of the city center. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.
What to plant each month in Fort Smith
January
Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, chives, collard greens, ginger, kale, leeks, lettuce, marigolds, onions, oregano, parsley, peppers, petunias, ranunculus, rosemary, sage, snapdragons
February
Start indoors: basil, black-eyed susans, cabbages, cauliflower, celery, chives, cilantro, collard greens, eggplants, ginger, lettuce, marigolds, nasturtiums, peppers, ranunculus, sage, snapdragons, spinach, swiss chard, tomatoes
Plant or sow outdoors: beets, black-eyed susans, blackberries, blueberries, broccoli, cauliflower, chives, cilantro, collard greens, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, onions, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, spinach, strawberries, swiss chard, turnips, wildflowers
March
Start indoors: basil, cantaloupes, cosmos, cucumbers, okra, pumpkins, ranunculus, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garden mums, gladioli, grapes, green onions, kentucky bluegrass, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, onions, oregano, parsley, perennial ryegrass, petunias, potatoes, radishes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, sweet peas, swiss chard, tall fescue, thyme, turnips
April
Start indoors: zinnias
Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, chives, cilantro, cosmos, cucumbers, dahlias, dill, eggplants, garden mums, ginger, gladioli, grapes, green beans, green onions, kentucky bluegrass, lavenders, lettuce, lilies, marigolds, mints, nasturtiums, okra, oregano, parsley, peanuts, peppers, perennial ryegrass, petunias, pumpkins, ranunculus, rosemary, sage, spinach, st. augustinegrass, sunflowers, sweet corn, sweet peas, sweet potatoes, swiss chard, tall fescue, thyme, tomatoes, watermelons, winter squash, zoysiagrass, zucchini
May
Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, green onions, okra, peanuts, st. augustinegrass, sweet potatoes, zinnias, zoysiagrass
June
Plant or sow outdoors: bermudagrass, centipedegrass, st. augustinegrass, zoysiagrass
July
Plant for fall: brussels sprouts, peppers, potatoes, sweet corn, tomatoes
August
Plant for fall: bearded irises, beets, broccoli, brussels sprouts, cabbages, carrots, cauliflower, collard greens, cucumbers, green beans, lettuce, peas, peppers, radishes, snapdragons, spinach, sweet corn, swiss chard, turnips, zucchini
September
Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, carrots, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hydrangeas, kale, kentucky bluegrass, lettuce, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, roses, saffron, snapdragons, spinach, swiss chard, tall fescue, tulips, turnips
October
Plant for fall: cabbages, cauliflower, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, kale, kentucky bluegrass, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, saffron, spinach, tall fescue, tulips
November
Plant for fall: crocuses, daffodils, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
December
Start indoors: collard greens, leeks, onions, petunias, ranunculus
Frost dates and zones by ZIP code in Fort Smith
All 6 of Fort Smith's main ZIP codes take their frost dates from Ft Smith Rgnl Airport, so the dates on this page apply across the city. Every one of them is in zone 8a.
| ZIP code | Zone | Weather station | Typical last frost | Typical first frost |
|---|---|---|---|---|
| 72901 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
| 72903 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
| 72904 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
| 72908 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
| 72916 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
| 72923 | 8a | Ft Smith Rgnl Airport, 4.2 mi SSE | Mar 25 | Nov 6 |
Planting dates for popular crops in Fort Smith
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Feb 11 to 25 | Apr 8 to 22 | Jul 24 to 31 |
| Strawberries | — | Feb 11 to 25 | — |
| Lettuce | Jan 28 to Feb 11 | Mar 18 to Apr 1 | Aug 7 to Sep 11 |
| Cilantro | Feb 11 to 25 | Mar 25 to Apr 1 | — |
| Basil | Feb 18 to Mar 4 | Apr 8 to 15 | — |
| Potatoes | — | Mar 5 to 12 | Jul 17 to 24 |
| Garlic | — | Feb 11 to 25 | Nov 6 to 20 |
| Onions | Dec 3 to Jan 14 | Feb 25 to Mar 11 | — |
| Cucumbers | Mar 11 to 25 | Apr 8 to 22 | Aug 7 to 21 |
| Pumpkins | Mar 11 to 25 | Apr 8 to 22 | — |
| Peppers | Jan 21 to Feb 18 | Apr 8 to 22 | Jul 17 to Aug 14 |
| Carrots | — | Mar 4 to 25 | Aug 14 to Sep 4 |
| Sweet Potatoes | — | Apr 27 to May 4 | — |
| Watermelons | Mar 4 to 18 | Apr 8 to 22 | — |
| Sweet Corn | — | Mar 25 to Apr 8 | Jul 31 to Aug 14 |
| Green Beans | — | Apr 8 to 22 | Aug 14 to 21 |
| Zucchini | Mar 11 to 25 | Apr 8 to 22 | Aug 14 to 28 |
| Broccoli | Jan 7 to 28 | Feb 25 to Mar 11 | Aug 21 to Sep 18 |
| Peas | — | Feb 11 to 25 | Aug 14 to 28 |
| Spinach | Feb 11 to 18 | Mar 18 to Apr 1 | Aug 28 to Oct 2 |
| Sunflowers | — | Mar 25 to Apr 15 | — |
| Zinnias | Apr 17 to 24 | May 15 to 29 | — |
| Tulips | — | — | Sep 25 to Nov 20 |
| Daffodils | — | — | Sep 25 to Nov 6 |
| Grass Seed | — | Feb 11 to 25 | Sep 25 to Oct 9 |
Nearby cities
- Fayetteville, AR zone 7a, last frost Apr 15
- Springdale, AR zone 7a, last frost Apr 15
- Rogers, AR zone 7a, last frost Apr 12
- Bentonville, AR zone 7a, last frost Apr 8
- Broken Arrow, OK zone 7b, last frost Mar 31
- Tulsa, OK zone 7b, last frost Mar 31
Planting in ArkansasAbout zone 8aPrintable calendar for Fort Smith
Questions
When is the last frost in Fort Smith?
Around March 25 in a typical year, based on NOAA's 1991-2020 records for Ft Smith Rgnl Airport. There is still a 1 in 10 chance of frost after April 11.
What planting zone is Fort Smith in?
USDA hardiness zone 8a (2023 map). The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.
When should I plant tomatoes in Fort Smith?
Start seeds indoors February 11 to 25 and set plants out April 8 to 22; the safest date to plant out is after April 11.
When is the first frost in Fort Smith?
Around November 6 in a typical year, and before October 23 about 1 year in 10.