GardenFacts

All states › Georgia › Newnan

Frost dates and planting calendar for Newnan, Georgia

Updated October 30, 2026. Based on USDA, NOAA and Colorado State University Extension data. Published by Humblebee.

USDA hardiness zone
8a[1]
Median last spring frost
Apr 3[2]
Median first fall frost
Nov 2[3]
Growing season, median
214 days[4]

Newnan, Georgia sits in USDA hardiness zone 8a[1]. The median last spring frost at the nearby NOAA station is April 3[2].

Frost dates

JanFebMarAprMayJunJulAugSepOctNovDecLast spring frost: 9 in 10 years after Mar 16, half of years Apr 3, 1 in 10 years after Apr 18Last frostmedian Apr 3First fall frost: 9 in 10 years before Nov 18, half of years Nov 2, 1 in 10 years before Oct 22First frostmedian Nov 2Frost riskHardyHardy vegetables: plant Mar 6 to Mar 20Mar 6 to Mar 20Semi-hardySemi-hardy vegetables: plant Mar 20 to Apr 3Mar 20 to Apr 3TenderTender vegetables: plant around Apr 3around Apr 3Very tenderVery tender vegetables: plant from Apr 17from Apr 17
Shaded: the span between the dates frost passes in 9 of 10 years and 1 of 10 years[2][3]. Green: planting windows from the CSU rules applied to the median last frost (GardenFacts calculation)[6]. Exact dates are in the tables below.

The frost dates here come from NOAA climate normals for the Newnan 7WNW station[5]. They use records from 1991 to 2020[5]. In half of years the last spring frost comes after April 3, and in 1 of 10 years it comes after April 18[2]. In half of years the first fall frost comes before November 2, and in 1 of 10 years it comes before October 22[3]. These are odds from past years, so any year can be earlier or later.

Frost Likely (9 in 10 years) Even odds (5 in 10) Unlikely (1 in 10)
Last spring frost (32°F)[2] after March 16 after April 3 after April 18
First fall frost (32°F)[3] before October 22 before November 2 before November 18
  • Hard freeze (28°F): median last spring date March 21, median first fall date November 15[7].
  • Frost-free growing season: at least 193 days in 9 of 10 years, 214 days in half of years and 237 days in 1 of 10 years[4].
  • The low reached 32°F or colder in 100% of years and 28°F or colder in 100% of years[8].
  • Weather station: Newnan 7WNW (USC00096335), 8.1 miles from the city center, 795 feet, 17 years of 1991 to 2020 records[5].

When to plant vegetables

Colorado State University Extension wrote its vegetable planting guide for Colorado, so we use its rules as a starting point[6]. Hardy vegetables such as broccoli, lettuce and peas can go in as early as 2 to 4 weeks before the median last frost, which works out to March 6 to March 20 in Newnan[6]. Semi-hardy vegetables such as carrots and potatoes can go in as early as 2 weeks before the median last frost, from March 20 up to April 3[9]. Tender vegetables such as snap beans and sweet corn can be started from seed around April 3[10]. Very tender vegetables such as tomatoes and peppers typically wait 2 or more weeks after the median last frost, so the earliest start is April 17[11].

  • Hardy (broccoli, cabbage, kohlrabi, lettuce, onions, peas, radishes, spinach, turnips): as early as 2 to 4 weeks before the median last frost (April 3) is March 6 to March 20[6]
  • Semi-hardy (beets, carrots, cauliflower, parsnips, potatoes, Swiss chard): as early as 2 weeks before the median last frost (April 3) is March 20, up to the median date itself[9]
  • Tender (snap beans, sweet corn, cucumbers, summer squash): from seed around the median last frost date, April 3[10]
  • Very tender (cantaloupe, eggplant, peppers, tomatoes, winter squash, watermelon): the earliest start, two weeks after the median last frost (April 3), is April 17[11]
Vegetable (CSU group) Plant from First harvest around
Broccoli (hardy)[12] Mar 6 May 10 (from transplants)
Cabbage (hardy)[12] Mar 6 May 30 (from transplants)
Kohlrabi (hardy)[12] Mar 6 Apr 25
Lettuce (hardy)[12] Mar 6 May 5
Onions (hardy)[12] Mar 6 Jun 24
Peas (hardy)[12] Mar 6 May 10
Radishes (hardy)[12] Mar 6 Apr 5
Spinach (hardy)[12] Mar 6 Apr 15
Turnips (hardy)[12] Mar 6 Apr 25
Beets (semi-hardy)[12] Mar 20 May 19
Carrots (semi-hardy)[12] Mar 20 May 29
Cauliflower (semi-hardy)[12] Mar 20 not listed
Parsnips (semi-hardy)[12] Mar 20 May 29
Potatoes (semi-hardy)[12] Mar 20 Jul 23
Swiss chard (semi-hardy)[12] Mar 20 May 19
Snap beans (tender)[12] Apr 3 Jun 2
Sweet corn (tender)[12] Apr 3 Jun 2
Cucumbers (tender)[12] Apr 3 May 28
Summer squash (tender)[12] Apr 3 May 23
Cantaloupe (very tender)[12] Apr 17 Jul 11
Eggplant (very tender)[12] Apr 17 Jun 16 (from transplants)
Peppers (very tender)[12] Apr 17 Jun 26 (from transplants)
Tomatoes (very tender)[12] Apr 17 Jun 21 (from transplants)
Winter squash (very tender)[12] Apr 17 Jul 26
Watermelon (very tender)[12] Apr 17 Jul 11
Spacing, depth and soil temperature (CSU Extension)
Vegetable Min. soil temp Depth Spacing Days to harvest
Broccoli[13] 40°F 1/2 in 18 in 65
Cabbage[13] 40°F 1/2 in 18 in 85
Kohlrabi[13] 40°F 1/2 in 7-9 in 50
Lettuce[13] 35°F 1/4 in 7-9 in 60
Onions[13] 35°F 1/4 in (seed), 1-2 in (sets) 4-6 in 110
Peas[13] 40°F 1 in 4-6 in 65
Radishes[13] 40°F 1/2 in 2-3 in 30
Spinach[13] 40°F 1/2 in 4-6 in 40
Turnips[13] 40°F 1/2 in 4-6 in 50
Beets[13] 40°F 3/4-1 in 4-6 in 60
Carrots[13] 40°F 1/4 in 2-3 in 70
Cauliflower[13] 40°F 1/2 in 18 in –
Parsnips[13] 35°F 1/2 in 5-6 in 70
Potatoes[13] 45°F – – 125
Swiss chard[13] 40°F 1 in 7-9 in 60
Snap beans[13] 55°F 1-1 1/2 in 6 in 60
Sweet corn[13] 50°F 1-1 1/2 in 12 x 30 in or 9 x 36 in 60-90
Cucumbers[13] 60°F 1 in 6 in trellised, 24-36 in untrellised 55
Summer squash[13] 60°F 1-1 1/2 in 36-48 in 50
Cantaloupe[13] 60°F 1-1 1/2 in 36-48 in 85
Eggplant[13] 60°F 1/4 in 18-24 in 60
Peppers[13] 60°F 1/4 in 15-18 in 70
Tomatoes[13] 50°F 1/4 in 24 in trellised 65
Winter squash[13] 60°F 1-1 1/2 in 36-48 in 100
Watermelon[13] 60°F 1-1 1/2 in 36-48 in 85

Hardiness zone

Zone 8a means the coldest night of a typical winter falls between 10°F and 15°F, averaged over 1991 to 2020[1]. The zone is based on winter lows, not on summer heat or frost dates[14]. All of Newnan's land area lies in ZIP code areas rated zone 8a, so the city does not span more than one zone[15].

Zone 8a: average annual extreme minimum temperature 10°F to 15°F (1991 to 2020)[1]. Modeled value at the city center: 13.7°F[1].

Share of the city's land area by ZIP code zone: zone 8a 100%[15].

All towns in zone 8a and what zone 8a means

Zone by ZIP code
ZIP code Zone Coldest night range
30263[15] 8a 10 to 15°F
30265[15] 8a 10 to 15°F
30277[15] 8a 10 to 15°F

Questions people ask

What growing zone is Newnan, Georgia?
The 2023 USDA map puts the center of Newnan in zone 8a[1]. All of the city's land area is in ZIP code areas rated 8a[15].
When is the last frost in Newnan?
The median last spring frost is April 3, so in half of years the last frost comes after that date[2]. In 1 of 10 years it comes after April 18[2].
When to plant tomatoes in Newnan?
CSU Extension says tomatoes typically go in 2 or more weeks after the average last spring frost[11]. Using the median last frost, the earliest start is April 17[11].
When is the first frost in Newnan?
The median first fall frost is November 2, so in half of years it comes before that date[3]. In 1 of 10 years it comes before October 22[3].
How long is the growing season in Newnan?
The growing season is at least 214 days in half of years[4]. It is at least 193 days in 9 of 10 years[4].

Facts and sources

  1. The 2023 USDA Plant Hardiness Zone Map puts the center of Newnan, Georgia in zone 8a. Zone 8a means an average annual extreme minimum temperature of 10°F to 15°F over 1991 to 2020. The map's modeled value at the city center is 13.7°F. USDA zone map 2023 (PRISM, OSU)
  2. Last spring frost (32°F) at this station: in 9 of 10 years the last frost comes after March 16, in half of years after April 3, and in 1 of 10 years after April 18 (NOAA 1991 to 2020 normals). The median last frost date is April 3. NOAA Climate Normals 1991-2020
  3. First fall frost (32°F) at this station: in 1 of 10 years the first frost comes before October 22, in half of years before November 2, and in 9 of 10 years before November 18 (NOAA 1991 to 2020 normals). The median first frost date is November 2. NOAA Climate Normals 1991-2020
  4. Growing season (days between the last spring and first fall 32°F frost) at this station: at least 193 days in 9 of 10 years, at least 214 days in half of years, and at least 237 days in 1 of 10 years. NOAA Climate Normals 1991-2020
  5. Frost dates on this page come from NOAA climate normals for the Newnan 7WNW weather station (USC00096335), 8.1 miles from the center of Newnan at 795 feet, using 17 years of records from 1991 to 2020. NOAA Climate Normals 1991-2020
  6. Colorado State University Extension's vegetable planting guide (written for Colorado) groups broccoli, cabbage, kohlrabi, lettuce, onions, peas, radishes, spinach, turnips as hardy vegetables, with this rule: as early as 2-4 weeks before the average last... CSU Extension GardenNotes #720
  7. Hard freeze (28°F) at this station: the median last spring date is March 21 and the median first fall date is November 15. NOAA Climate Normals 1991-2020
  8. At this station the low reached 32°F or colder in 100% of years from 1991 to 2020, and 28°F or colder in 100% of years. NOAA Climate Normals 1991-2020
  9. Colorado State University Extension's vegetable planting guide (written for Colorado) groups beets, carrots, cauliflower, parsnips, potatoes, Swiss chard as semi-hardy vegetables, with this rule: as early as 0-2 weeks before the average last spring frost.... CSU Extension GardenNotes #720
  10. Colorado State University Extension's vegetable planting guide (written for Colorado) groups snap beans, sweet corn, cucumbers, summer squash as tender vegetables, with this rule: from seed around the average last spring frost; cucumber and summer squash... CSU Extension GardenNotes #720
  11. Colorado State University Extension's vegetable planting guide (written for Colorado) groups cantaloupe, eggplant, peppers, tomatoes, winter squash, watermelon as very tender vegetables, with this rule: typically 2 or more weeks after the average last... CSU Extension GardenNotes #720
  12. GardenFacts calculation: earliest planting date plus CSU days to harvest (table on this page), from the station's median last frost. NOAA Climate Normals 1991-2020
  13. CSU Extension vegetable table: soil temperature, depth, spacing, days to harvest (table on this page). CSU Extension GardenNotes #720
  14. USDA hardiness zones are based on the average annual extreme minimum winter temperature (the coldest night of each winter, averaged over 1991 to 2020 for the 2023 map), not on summer heat or frost dates. Each zone spans 10°F and each half zone (a or b)... USDA Plant Hardiness Zone Map
  15. Newnan, Georgia overlaps 3 ZIP code areas. By land area, 100% lies in ZIP code areas rated zone 8a. USDA zone map 2023 (PRISM, OSU)

Frost dates are probabilities from 1991 to 2020 weather records at one NOAA station, not a forecast. Any year can be earlier or later. The hardiness zone describes the average coldest winter night, not frost dates or summer heat. Spots inside the city can differ (ZIP table). Planting rules come from Colorado State University Extension's guide, written for Colorado. A local extension office may give dates tuned to the area. Planting and harvest dates marked GardenFacts calculation are simple arithmetic from the facts above, not advice from the source.

Hardiness zone data: USDA Plant Hardiness Zone Map (2023), USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu, accessed October 30, 2026. This is not the official USDA map. Frost data: NOAA NCEI U.S. Climate Normals 1991-2020. Planting rules: Colorado State University Extension.