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Frost dates and planting calendar for Henderson, Nevada

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

USDA hardiness zone
9b[1]
Median last spring frost
Jan 20[2]
Median first fall frost
Dec 15[3]
Growing season, median
333 days[4]

The center of Henderson, Nevada is in USDA hardiness zone 9b[1]. The median last spring frost is January 20, based on NOAA records from 1991 to 2020[2].

Frost dates

JanFebMarAprMayJunJulAugSepOctNovDecLast frostmedian Jan 20First frostmedian Dec 15Frost riskHardyHardy vegetables: plant Dec 23 to Jan 6Dec 23 to Jan 6Semi-hardySemi-hardy vegetables: plant Jan 6 to Jan 20Jan 6 to Jan 20TenderTender vegetables: plant around Jan 20around Jan 20Very tenderVery tender vegetables: plant from Feb 3from Feb 3
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.

These frost dates are odds from NOAA records for 1991 to 2020, not a forecast. They come from the Las Vegas Mccarran Airport weather station, which is near Henderson[5]. In half of years the last spring frost comes after January 20, and in 1 of 10 years it comes after February 14[2]. In half of years the first fall frost comes before December 15, and in 1 of 10 years it comes before November 28[3].

Frost Likely (9 in 10 years) Even odds (5 in 10) Unlikely (1 in 10)
Last spring frost (32°F)[2] after December 20 after January 20 after February 14
First fall frost (32°F)[3] before November 28 before December 15 before January 7
  • Hard freeze (28°F): median last spring date December 31, median first fall date December 26[7].
  • Frost-free growing season: at least 299 days in 9 of 10 years, 333 days in half of years and 360 days in 1 of 10 years[4].
  • The low reached 32°F or colder in 94.3% of years and 28°F or colder in 45.2% of years[8].
  • Weather station: Las Vegas Mccarran Airport (USW00023169), 8.8 miles from the city center, 2,131 feet, 28 years of 1991 to 2020 records[5].

When to plant vegetables

Colorado State University Extension's planting guide was written for Colorado[6]. GardenFacts uses the NOAA median last frost of January 20 as the average last frost in its rules[6]. Hardy vegetables such as broccoli, lettuce and peas can go in as early as 2 to 4 weeks before that date, which is December 23 to January 6[6]. Semi-hardy vegetables such as carrots and potatoes can go in as early as 2 weeks before, which is January 6[9]. Tender vegetables such as snap beans and sweet corn can be planted from seed around January 20[10]. Very tender vegetables such as tomatoes and peppers typically start 2 or more weeks after the median last frost, with the earliest start on February 3[11].

  • Hardy (broccoli, cabbage, kohlrabi, lettuce, onions, peas, radishes, spinach, turnips): as early as 2 to 4 weeks before the median last frost (January 20) is December 23 to January 6[6]
  • Semi-hardy (beets, carrots, cauliflower, parsnips, potatoes, Swiss chard): as early as 2 weeks before the median last frost (January 20) is January 6, up to the median date itself[9]
  • Tender (snap beans, sweet corn, cucumbers, summer squash): from seed around the median last frost date, January 20[10]
  • Very tender (cantaloupe, eggplant, peppers, tomatoes, winter squash, watermelon): the earliest start, two weeks after the median last frost (January 20), is February 3[11]
Vegetable (CSU group) Plant from First harvest around
Broccoli (hardy)[12] Dec 23 Feb 26 (from transplants)
Cabbage (hardy)[12] Dec 23 Mar 18 (from transplants)
Kohlrabi (hardy)[12] Dec 23 Feb 11
Lettuce (hardy)[12] Dec 23 Feb 21
Onions (hardy)[12] Dec 23 Apr 12
Peas (hardy)[12] Dec 23 Feb 26
Radishes (hardy)[12] Dec 23 Jan 22
Spinach (hardy)[12] Dec 23 Feb 1
Turnips (hardy)[12] Dec 23 Feb 11
Beets (semi-hardy)[12] Jan 6 Mar 7
Carrots (semi-hardy)[12] Jan 6 Mar 17
Cauliflower (semi-hardy)[12] Jan 6 not listed
Parsnips (semi-hardy)[12] Jan 6 Mar 17
Potatoes (semi-hardy)[12] Jan 6 May 11
Swiss chard (semi-hardy)[12] Jan 6 Mar 7
Snap beans (tender)[12] Jan 20 Mar 21
Sweet corn (tender)[12] Jan 20 Mar 21
Cucumbers (tender)[12] Jan 20 Mar 16
Summer squash (tender)[12] Jan 20 Mar 11
Cantaloupe (very tender)[12] Feb 3 Apr 29
Eggplant (very tender)[12] Feb 3 Apr 4 (from transplants)
Peppers (very tender)[12] Feb 3 Apr 14 (from transplants)
Tomatoes (very tender)[12] Feb 3 Apr 9 (from transplants)
Winter squash (very tender)[12] Feb 3 May 14
Watermelon (very tender)[12] Feb 3 Apr 29
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 9b means the coldest night of the winter averages 25°F to 30°F over 1991 to 2020[1]. The zone is based on that coldest night, not on summer heat or frost dates[14]. Henderson overlaps 14 ZIP code areas[15]. By land area, 68% lies in zone 9b areas and 32% lies in zone 9a areas[15].

Zone 9b: average annual extreme minimum temperature 25°F to 30°F (1991 to 2020)[1]. Modeled value at the city center: 26°F[1].

Share of the city's land area by ZIP code zone: zone 9b 68%, zone 9a 32%[15].

All towns in zone 9b and what zone 9b means

Zone by ZIP code
ZIP code Zone Coldest night range
89015[15] 9b 25 to 30°F
89052[15] 9a 20 to 25°F
89044[15] 9a 20 to 25°F
89011[15] 9b 25 to 30°F
89012[15] 9b 25 to 30°F
89002[15] 9b 25 to 30°F
89074[15] 9b 25 to 30°F
89014[15] 9b 25 to 30°F
89054[15] 9a 20 to 25°F
89005[15] 9b 25 to 30°F
89122[15] 9b 25 to 30°F
89183[15] 9a 20 to 25°F
89123[15] 9b 25 to 30°F
89120[15] 9b 25 to 30°F

Questions people ask

What growing zone is Henderson, Nevada?
The center of Henderson is in USDA zone 9b[1]. By land area, 68% of the city is in zone 9b ZIP code areas and 32% is in zone 9a ZIP code areas[15].
When is the last frost in Henderson?
The median last spring frost is January 20, so in half of years the last frost comes after that date[2]. In 1 of 10 years it comes after February 14[2].
When to plant tomatoes in Henderson?
CSU Extension lists tomatoes as very tender, typically planted 2 or more weeks after the average last spring frost[11]. Using the median last frost, the earliest start is February 3[11].
When is the first frost in Henderson?
The median first fall frost is December 15, so in half of years the first frost comes before that date[3]. In 1 of 10 years it comes before November 28[3].
How long is the growing season in Henderson?
In half of years the season between the last spring and first fall frost is at least 333 days[4]. In 9 of 10 years it is at least 299 days[4].

Facts and sources

  1. The 2023 USDA Plant Hardiness Zone Map puts the center of Henderson, Nevada in zone 9b. Zone 9b means an average annual extreme minimum temperature of 25°F to 30°F over 1991 to 2020. The map's modeled value at the city center is 26°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 December 20, in half of years after January 20, and in 1 of 10 years after February 14 (NOAA 1991 to 2020 normals). The median last frost date is January 20. NOAA Climate Normals 1991-2020
  3. First fall frost (32°F) at this station: in 1 of 10 years the first frost comes before November 28, in half of years before December 15, and in 9 of 10 years before January 7 (NOAA 1991 to 2020 normals). The median first frost date is December 15. NOAA Climate Normals 1991-2020
  4. Growing season (days between the last spring and first fall 32°F frost) at this station: at least 299 days in 9 of 10 years, at least 333 days in half of years, and at least 360 days in 1 of 10 years. NOAA Climate Normals 1991-2020
  5. Frost dates on this page come from NOAA climate normals for the Las Vegas Mccarran Airport weather station (USW00023169), 8.8 miles from the center of Henderson at 2,131 feet, using 28 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 December 31 and the median first fall date is December 26. NOAA Climate Normals 1991-2020
  8. At this station the low reached 32°F or colder in 94.3% of years from 1991 to 2020, and 28°F or colder in 45.2% 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. Henderson, Nevada overlaps 14 ZIP code areas. By land area, 68% lies in ZIP code areas rated zone 9b, 32% lies in ZIP code areas rated zone 9a. 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.