Las Vegas, NV Vegetable Planting Calendar
When to plant 26 vegetables in Las Vegas, for the 2027 season, based on 1991–2020 normals. The dates build on the 32°F frost odds at Las Vegas Air Terminal (4.1 mi ESE), shifted by CSU Extension timing rules. You'll find each rule and its source below.
Not every year freezes at Las Vegas Air Terminal: NOAA gives a 96.7% chance of a 32°F night in a given year. The dates below use the frost odds for the years that do.
These are Colorado State University Extension (spring) and University of Nebraska–Lincoln Extension (fall) timing rules, applied to Las Vegas's own NOAA frost dates. Nevada extension guidance may differ, so check it too.
Frost anchors: typical last frost Jan 24 (50%), balanced Feb 4 (30%), safe Feb 19 (10%); typical first frost Dec 10. Station Las Vegas Air Terminal (USW00053123), confidence Medium. USDA zone 8b–9b (2023). Las Vegas frost dates & growing zone.
What to plant now in Las Vegas
In October:
- Last day to sow kohlrabi for a fall harvest (by Oct 7)
- Last day to sow turnips for a fall harvest (by Oct 7)
- Last day to sow spinach for a fall harvest (by Oct 17)
- Last day to sow radishes for a fall harvest (by Oct 27)
The list above is for the month this page was built; the box is refreshed in your browser for today's date.
Spring planting dates
“Plant out” means transplanting for crops started indoors and sowing or planting directly in the garden for the others. Each column applies CSU Extension's timing rule to a different last-frost anchor: aggressive = typical date (Jan 24, 50% risk), balanced = Feb 4 (30%), safe = Feb 19 (10%). For hardy crops the cell shows the CSU “as early as” window.
| Crop | How | Start indoors | Plant out: aggressive (50%) | Balanced (30%) | Safe (10%) | Min. soil temp |
|---|---|---|---|---|---|---|
| Tomatoes Very tender (warm season) |
transplant | Feb 14–28 | Apr 4 | Apr 4 | Apr 4 | 50°F |
| Peppers Very tender (warm season) |
transplant | Dec 24 – Jan 7 | Feb 7 | Feb 18 | Mar 5 | 60°F |
| Potatoes Semi-hardy (cool season) |
plant (seed pieces) | – | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 45°F |
| Onions (dry, from sets) Hardy (cool season) |
plant sets | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 35°F |
| Peas Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Lettuce (leaf) Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 35°F |
| Carrots Semi-hardy (cool season) |
direct sow | – | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 40°F |
| Beans (snap) Tender (warm season) |
direct sow | – | Jan 24 | Feb 4 | Feb 19 | 55°F |
| Summer squash Tender (warm season) |
direct sow | – | Jan 24 | Feb 4 | Feb 19 | 60°F |
| Broccoli Hardy (cool season) |
transplant | Nov 19 – Dec 3 | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Cabbage Hardy (cool season) |
transplant | Nov 19 – Dec 3 | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Cauliflower Semi-hardy (cool season) |
transplant | Dec 3–17 | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 40°F |
| Kohlrabi Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Green onions Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 35°F |
| Radishes Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Spinach Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Turnips Hardy (cool season) |
direct sow | – | Dec 27 – Jan 10 | Jan 7–21 | Jan 22 – Feb 5 | 40°F |
| Beets Semi-hardy (cool season) |
direct sow | – | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 40°F |
| Swiss chard Semi-hardy (cool season) |
direct sow | – | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 40°F |
| Parsnips Semi-hardy (cool season) |
direct sow | – | Jan 10–24 | Jan 21 – Feb 4 | Feb 5–19 | 35°F |
| Sweet corn Tender (warm season) |
direct sow | – | Jan 24 | Feb 4 | Feb 19 | 50°F |
| Cucumbers Tender (warm season) |
direct sow | – | Jan 24 | Feb 4 | Feb 19 | 60°F |
| Eggplant Very tender (warm season) |
transplant | Dec 17 – Jan 7 | Feb 7 | Feb 18 | Mar 5 | 60°F |
| Cantaloupe Very tender (warm season) |
direct sow | – | Feb 7 | Feb 18 | Mar 5 | 60°F |
| Watermelon Very tender (warm season) |
direct sow | – | Feb 7 | Feb 18 | Mar 5 | 60°F |
| Winter squash Very tender (warm season) |
direct sow | – | Feb 7 | Feb 18 | Mar 5 | 60°F |
Before sowing, check the soil too. CSU recommends taking its temperature at 4 inches (6 inches for beans). Since NOAA publishes no soil-temperature normals, we give CSU's minimum soil temperature for each crop rather than a date.
Fall planting dates
Latest dates for a fall harvest, using the University of Nebraska–Lincoln Extension count-back formula: days to harvest (CSU) + 14-day fall factor + 14-day frost-tender factor for frost-sensitive crops, counted back from the first-frost date. For transplanted crops (CSU days are from transplant) the result is the latest transplant date; seeds go in CSU's transplant-age weeks earlier. We add no harvest period, so these dates give you a first harvest by the first frost, not a long harvest.
| Crop | How | Days counted back | By (typical first frost Dec 10) | By (early first frost Nov 24) |
|---|---|---|---|---|
| Peas | sow | 79 | Sep 22 | Sep 6 |
| Lettuce (leaf) | sow | 74 | Sep 27 | Sep 11 |
| Carrots | sow | 84 | Sep 17 | Sep 1 |
| Beans (snap) | sow | 88 (frost-tender) | Sep 13 | Aug 28 |
| Summer squash | sow | 78 (frost-tender) | Sep 23 | Sep 7 |
| Broccoli | transplant (start seeds Aug 4–18) | 79 | Sep 22 | Sep 6 |
| Cabbage | transplant (start seeds Jul 15–29) | 99 | Sep 2 | Aug 17 |
| Kohlrabi | sow | 64 | Oct 7 | Sep 21 |
| Green onions | sow | 74 | Sep 27 | Sep 11 |
| Radishes | sow | 44 | Oct 27 | Oct 11 |
| Spinach | sow | 54 | Oct 17 | Oct 1 |
| Turnips | sow | 64 | Oct 7 | Sep 21 |
| Beets | sow | 74 | Sep 27 | Sep 11 |
| Swiss chard | sow | 74 | Sep 27 | Sep 11 |
| Cucumbers | sow | 83 (frost-tender) | Sep 18 | Sep 2 |
Month-by-month: what to plant in Las Vegas
What to plant in Las Vegas in January
- Potatoes: plant (seed pieces) outdoors (Jan 10 – Feb 19)
- Carrots: direct sow outdoors (Jan 10 – Feb 19)
- Cauliflower: transplant outdoors (Jan 10 – Feb 19)
- Beets: direct sow outdoors (Jan 10 – Feb 19)
- Swiss chard: direct sow outdoors (Jan 10 – Feb 19)
- Parsnips: direct sow outdoors (Jan 10 – Feb 19)
- Beans (snap): direct sow outdoors (Jan 24 – Feb 19)
- Summer squash: direct sow outdoors (Jan 24 – Feb 19)
- Sweet corn: direct sow outdoors (Jan 24 – Feb 19)
- Cucumbers: direct sow outdoors (Jan 24 – Feb 19)
- Start eggplant seeds indoors (Dec 17 – Jan 7)
- Start pepper seeds indoors (Dec 24 – Jan 7)
- Onions (dry, from sets): plant sets outdoors (Dec 27 – Feb 5)
- Peas: direct sow outdoors (Dec 27 – Feb 5)
- Lettuce (leaf): direct sow outdoors (Dec 27 – Feb 5)
- Broccoli: transplant outdoors (Dec 27 – Feb 5)
- Cabbage: transplant outdoors (Dec 27 – Feb 5)
- Kohlrabi: direct sow outdoors (Dec 27 – Feb 5)
- Green onions: direct sow outdoors (Dec 27 – Feb 5)
- Radishes: direct sow outdoors (Dec 27 – Feb 5)
- Spinach: direct sow outdoors (Dec 27 – Feb 5)
- Turnips: direct sow outdoors (Dec 27 – Feb 5)
What to plant in Las Vegas in February
- Peppers: transplant outdoors (Feb 7 – Mar 5)
- Eggplant: transplant outdoors (Feb 7 – Mar 5)
- Cantaloupe: direct sow outdoors (Feb 7 – Mar 5)
- Watermelon: direct sow outdoors (Feb 7 – Mar 5)
- Winter squash: direct sow outdoors (Feb 7 – Mar 5)
- Start tomato seeds indoors (Feb 14–28)
- Onions (dry, from sets): plant sets outdoors (Dec 27 – Feb 5)
- Peas: direct sow outdoors (Dec 27 – Feb 5)
- Lettuce (leaf): direct sow outdoors (Dec 27 – Feb 5)
- Broccoli: transplant outdoors (Dec 27 – Feb 5)
- Cabbage: transplant outdoors (Dec 27 – Feb 5)
- Kohlrabi: direct sow outdoors (Dec 27 – Feb 5)
- Green onions: direct sow outdoors (Dec 27 – Feb 5)
- Radishes: direct sow outdoors (Dec 27 – Feb 5)
- Spinach: direct sow outdoors (Dec 27 – Feb 5)
- Turnips: direct sow outdoors (Dec 27 – Feb 5)
- Potatoes: plant (seed pieces) outdoors (Jan 10 – Feb 19)
- Carrots: direct sow outdoors (Jan 10 – Feb 19)
- Cauliflower: transplant outdoors (Jan 10 – Feb 19)
- Beets: direct sow outdoors (Jan 10 – Feb 19)
- Swiss chard: direct sow outdoors (Jan 10 – Feb 19)
- Parsnips: direct sow outdoors (Jan 10 – Feb 19)
- Beans (snap): direct sow outdoors (Jan 24 – Feb 19)
- Summer squash: direct sow outdoors (Jan 24 – Feb 19)
- Sweet corn: direct sow outdoors (Jan 24 – Feb 19)
- Cucumbers: direct sow outdoors (Jan 24 – Feb 19)
What to plant in Las Vegas in March
- Peppers: transplant outdoors (Feb 7 – Mar 5)
- Eggplant: transplant outdoors (Feb 7 – Mar 5)
- Cantaloupe: direct sow outdoors (Feb 7 – Mar 5)
- Watermelon: direct sow outdoors (Feb 7 – Mar 5)
- Winter squash: direct sow outdoors (Feb 7 – Mar 5)
What to plant in Las Vegas in April
- Tomatoes: transplant outdoors (Apr 4)
What to plant in Las Vegas in July
- Start cabbage seeds indoors for a fall crop (Jul 15–29)
What to plant in Las Vegas in August
- Start broccoli seeds indoors for a fall crop (Aug 4–18)
What to plant in Las Vegas in September
- Last day to set out cabbage transplants for a fall harvest (by Sep 2)
- Last day to sow beans (snap) for a fall harvest (by Sep 13)
- Last day to sow carrots for a fall harvest (by Sep 17)
- Last day to sow cucumbers for a fall harvest (by Sep 18)
- Last day to sow peas for a fall harvest (by Sep 22)
- Last day to set out broccoli transplants for a fall harvest (by Sep 22)
- Last day to sow summer squash for a fall harvest (by Sep 23)
- Last day to sow lettuce (leaf) for a fall harvest (by Sep 27)
- Last day to sow green onions for a fall harvest (by Sep 27)
- Last day to sow beets for a fall harvest (by Sep 27)
- Last day to sow swiss chard for a fall harvest (by Sep 27)
What to plant in Las Vegas in October
- Last day to sow kohlrabi for a fall harvest (by Oct 7)
- Last day to sow turnips for a fall harvest (by Oct 7)
- Last day to sow spinach for a fall harvest (by Oct 17)
- Last day to sow radishes for a fall harvest (by Oct 27)
What to plant in Las Vegas in November
- Start broccoli seeds indoors (Nov 19 – Dec 3)
- Start cabbage seeds indoors (Nov 19 – Dec 3)
What to plant in Las Vegas in December
- Start cauliflower seeds indoors (Dec 3–17)
- Start eggplant seeds indoors (Dec 17 – Jan 7)
- Start pepper seeds indoors (Dec 24 – Jan 7)
- Onions (dry, from sets): plant sets outdoors (Dec 27 – Feb 5)
- Peas: direct sow outdoors (Dec 27 – Feb 5)
- Lettuce (leaf): direct sow outdoors (Dec 27 – Feb 5)
- Broccoli: transplant outdoors (Dec 27 – Feb 5)
- Cabbage: transplant outdoors (Dec 27 – Feb 5)
- Kohlrabi: direct sow outdoors (Dec 27 – Feb 5)
- Green onions: direct sow outdoors (Dec 27 – Feb 5)
- Radishes: direct sow outdoors (Dec 27 – Feb 5)
- Spinach: direct sow outdoors (Dec 27 – Feb 5)
- Turnips: direct sow outdoors (Dec 27 – Feb 5)
- Start broccoli seeds indoors (Nov 19 – Dec 3)
- Start cabbage seeds indoors (Nov 19 – Dec 3)
Crop-by-crop notes
When to plant tomatoes in Las Vegas
Very tender crop. CSU Extension says to transplant tomatoes at least 2 weeks after the average last frost, with nights above 52°F. The frost rule alone would put Las Vegas at about Feb 7, but the average nightly low at Las Vegas Air Terminal isn't above 52°F until Apr 4, so the transplant date is about Apr 4 for the typical, balanced and safer choices alike. Start seeds indoors Feb 14–28, 5–7 weeks before transplanting on Apr 4. CSU notes that nights under 55°F hurt fruit set. The normal low at Las Vegas Air Terminal climbs to 55°F on Apr 17. Using CSU's typical 65 days from transplant to harvest, tomato plants set out on Apr 4 would start producing around Jun 8. That's 185 days before the typical first frost (Dec 10).
When to plant peppers in Las Vegas
Very tender crop. CSU Extension's rule is to set peppers out at least 2 weeks after the average last frost. That's about Feb 7 using the typical date, Feb 18 as a balanced choice, or Mar 5 if you go by the safer 10% date. Start seeds indoors Dec 24 – Jan 7, 6–8 weeks before transplanting on Feb 18. Below 55°F at night, fruit set suffers (CSU). At Las Vegas Air Terminal, the normal low reaches 55°F on Apr 17. CSU's typical time from transplant to harvest for pepper plants is 70 days. Set out on Feb 18, they would start producing around Apr 29, 225 days before the typical first frost (Dec 10).
When to plant potatoes in Las Vegas
Semi-hardy crop. CSU allows planting potatoes as early as 0–2 weeks before the average last frost, in soil at 45°F or warmer. For Las Vegas, that's roughly Jan 10–24 by the typical date or Feb 5–19 by the safer date.
When to plant onions (dry, from sets) in Las Vegas
Hardy crop. CSU says onions (dry, from sets) can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 35°F.
When to plant peas in Las Vegas
Hardy crop. CSU says peas can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 40°F. For a fall crop, sow by Sep 22, or by Sep 6 to be safe. That's 79 days back from the first-frost date.
When to plant lettuce (leaf) in Las Vegas
Hardy crop. CSU says lettuce (leaf) can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 35°F. In Las Vegas, that's roughly Dec 27 – Jan 10 going by the typical date, or Jan 22 – Feb 5 going by the safer date. For fall, sow by Sep 27 (Sep 11 to be safe), which is 74 days before the first-frost date.
When to plant carrots in Las Vegas
Semi-hardy crop. CSU says carrots can be planted as early as 0–2 weeks before the average last frost, in soil of at least 40°F. In Las Vegas, that's roughly Jan 10–24 going by the typical date, or Feb 5–19 going by the safer date. For a fall crop, sow by Sep 17, or by Sep 1 to be safe. That's 84 days back from the first-frost date.
When to plant beans (snap) in Las Vegas
Tender crop. Sow beans (snap) around the average last frost, per CSU: about Jan 24 in Las Vegas. Waiting until Feb 19 cuts the chance of a later 32°F night to 1 in 10. Seeds need soil of at least 55°F. For fall, sow by Sep 13 (Aug 28 to be safe), which is 88 days before the first-frost date.
When to plant summer squash in Las Vegas
Tender crop. CSU says to sow summer squash around the average last frost, about Jan 24 in Las Vegas. If you want only a 1-in-10 chance of a later 32°F night, wait until Feb 19. Seeds need soil of at least 60°F. For a fall crop, sow by Sep 23, or by Sep 7 to be safe. That's 78 days back from the first-frost date.
When to plant broccoli in Las Vegas
Hardy crop. Per CSU, broccoli can be planted as early as 2–4 weeks before the average last frost, as long as the soil is workable and at least 40°F. For Las Vegas, that works out to roughly Dec 27 – Jan 10 (typical date) or Jan 22 – Feb 5 (safer date). Using CSU's typical 65 days from transplant to harvest, broccoli plants set out on Jan 7 would start producing around Mar 13. That's 272 days before the typical first frost (Dec 10). For a fall harvest of broccoli, get transplants in the ground by Sep 22 (UNL Extension count-back from the typical first frost, Dec 10, with CSU's 65 days from transplant to harvest). To raise your own, sow seeds Aug 4–18, 5–7 weeks ahead (CSU).
When to plant cabbage in Las Vegas
Hardy crop. CSU says cabbage can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Las Vegas, that's roughly Dec 27 – Jan 10 going by the typical date, or Jan 22 – Feb 5 going by the safer date. Using CSU's typical 85 days from transplant to harvest, cabbage plants set out on Jan 7 would start producing around Apr 2. That's 252 days before the typical first frost (Dec 10). For a fall crop, set cabbage transplants out by Sep 2. That's UNL Extension's count-back from the typical first frost (Dec 10), using CSU's 85 days from transplant to harvest. If you grow your own transplants, start seeds Jul 15–29 (CSU: 5–7 weeks to transplant size).
When to plant cauliflower in Las Vegas
Semi-hardy crop. Per CSU, cauliflower can go in as early as 0–2 weeks before the average last frost: roughly Jan 10–24 in Las Vegas (typical date) or Feb 5–19 (safer date). The soil should be at least 40°F.
When to plant kohlrabi in Las Vegas
Hardy crop. CSU says kohlrabi can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 40°F. For fall, count back 64 days from the first-frost date. That means sowing by Oct 7, or by Sep 21 to be safe.
When to plant green onions in Las Vegas
Hardy crop. CSU says green onions can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 35°F. For fall, count back 74 days from the first-frost date. That means sowing by Sep 27, or by Sep 11 to be safe.
When to plant radishes in Las Vegas
Hardy crop. CSU says radishes can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 40°F. For fall, count back 44 days from the first-frost date. That means sowing by Oct 27, or by Oct 11 to be safe.
When to plant spinach in Las Vegas
Hardy crop. CSU says spinach can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 40°F. For a fall crop, sow by Oct 17, or by Oct 1 to be safe. That's 54 days back from the first-frost date.
When to plant turnips in Las Vegas
Hardy crop. CSU says turnips can go in as early as 2–4 weeks before the average last frost: roughly Dec 27 – Jan 10 in Las Vegas using the typical date, or Jan 22 – Feb 5 using the safer one. Wait until the soil can be worked and is at least 40°F. For fall, sow by Oct 7 (Sep 21 to be safe), which is 64 days before the first-frost date.
When to plant beets in Las Vegas
Semi-hardy crop. CSU allows planting beets as early as 0–2 weeks before the average last frost, in soil at 40°F or warmer. For Las Vegas, that's roughly Jan 10–24 by the typical date or Feb 5–19 by the safer date. For a fall crop, sow by Sep 27, or by Sep 11 to be safe. That's 74 days back from the first-frost date.
When to plant swiss chard in Las Vegas
Semi-hardy crop. Per CSU, swiss chard can go in as early as 0–2 weeks before the average last frost: roughly Jan 10–24 in Las Vegas (typical date) or Feb 5–19 (safer date). The soil should be at least 40°F. For fall, count back 74 days from the first-frost date. That means sowing by Sep 27, or by Sep 11 to be safe.
When to plant parsnips in Las Vegas
Semi-hardy crop. Per CSU, parsnips can go in as early as 0–2 weeks before the average last frost: roughly Jan 10–24 in Las Vegas (typical date) or Feb 5–19 (safer date). The soil should be at least 35°F.
When to plant sweet corn in Las Vegas
Tender crop. CSU's timing for sweet corn is around the average last frost, which is about Jan 24 in Las Vegas. For only a 1-in-10 chance of a later 32°F night, hold off until Feb 19. Seeds want soil at 50°F or warmer.
When to plant cucumbers in Las Vegas
Tender crop. Sow cucumbers around the average last frost, per CSU: about Jan 24 in Las Vegas. Waiting until Feb 19 cuts the chance of a later 32°F night to 1 in 10. Seeds need soil of at least 60°F. For fall, count back 83 days from the first-frost date. That means sowing by Sep 18, or by Sep 2 to be safe.
When to plant eggplant in Las Vegas
Very tender crop. CSU Extension's rule is 2+ weeks after the average last frost, which puts eggplant outside around Feb 7 (typical date), Feb 18 (balanced) or Mar 5 (safer 10% date). Start seeds indoors Dec 17 – Jan 7, 6–9 weeks ahead of transplanting on Feb 18. Using CSU's typical 60 days from transplant to harvest, eggplant plants set out on Feb 18 would start producing around Apr 19. That's 235 days before the typical first frost (Dec 10).
When to plant cantaloupe in Las Vegas
Very tender crop. Following CSU Extension's rule of 2+ weeks after the average last frost, plant cantaloupe around Feb 7 at the earliest, Feb 18 as a balanced choice, or Mar 5 to be safe. CSU's minimum soil temperature is 60°F.
When to plant watermelon in Las Vegas
Very tender crop. CSU Extension says to plant watermelon 2+ weeks after the average last frost: about Feb 7 (typical date), Feb 18 (balanced) or Mar 5 (safer 10% date). Wait for soil of at least 60°F.
When to plant winter squash in Las Vegas
Very tender crop. CSU Extension's rule is to plant winter squash at least 2 weeks after the average last frost. That's about Feb 7 using the typical date, Feb 18 as a balanced choice, or Mar 5 if you go by the safer 10% date. Seeds need soil of at least 60°F.
How these dates are calculated
| Rule | Applies to | Source (scope) |
|---|---|---|
| Hardy (cool season): “As early as 2-4 weeks before the date of the average last spring frost.” | Onions (dry, from sets), Peas, Lettuce (leaf), Broccoli, Cabbage, Kohlrabi, Green onions, Radishes, Spinach, Turnips | Colorado State University Extension, Vegetable Planting Guide (CMG GardenNotes #720) (written for Colorado; its frost-relative rules are applied to other states' NOAA frost dates and labelled as CSU (Colorado) rules) |
| Semi-hardy (cool season): “As early as 0-2 weeks before the date of the average last spring frost.” | Potatoes, Carrots, Cauliflower, Beets, Swiss chard, Parsnips | Colorado State University Extension, Vegetable Planting Guide (CMG GardenNotes #720) (written for Colorado; its frost-relative rules are applied to other states' NOAA frost dates and labelled as CSU (Colorado) rules) |
| Tender (warm season): “From seed: around the date of the average last spring frost” | Beans (snap), Summer squash, Sweet corn, Cucumbers | Colorado State University Extension, Vegetable Planting Guide (CMG GardenNotes #720) (written for Colorado; its frost-relative rules are applied to other states' NOAA frost dates and labelled as CSU (Colorado) rules) |
| Very tender (warm season): “Typically 2+ weeks after the average last spring frost date.” | Tomatoes, Peppers, Eggplant, Cantaloupe, Watermelon, Winter squash | Colorado State University Extension, Vegetable Planting Guide (CMG GardenNotes #720) (written for Colorado; its frost-relative rules are applied to other states' NOAA frost dates and labelled as CSU (Colorado) rules) |
| Start indoors = transplant age (weeks) before the balanced transplant date; days to harvest; minimum soil temperature | Crops with those values in CSU's table | CSU Extension, Vegetable Planting Guide (CMG GardenNotes #720) (written for Colorado; its frost-relative rules are applied to other states' NOAA frost dates and labelled as CSU (Colorado) rules) |
| Night-temperature dates: first day the NOAA 1991–2020 daily normal low (DLY-TMIN-NORMAL) is above the CSU transplant threshold or reaches the fruit-set threshold | Tomatoes (above 52°F at transplant, 55°F fruit set), peppers (55°F fruit set) | CSU Growing Tomatoes, CSU Peppers and Eggplants (written for Colorado; generic temperature thresholds applied nationwide with attribution) |
| Fall count-back: days to harvest + fall factor (14) + frost-tender factor (14) | Peas, Lettuce (leaf), Carrots, Beans (snap), Summer squash, Broccoli, Cabbage, Kohlrabi, Green onions, Radishes, Spinach, Turnips, Beets, Swiss chard, Cucumbers | UNL Extension, Fall Vegetable Gardening (G1343) (written for Nebraska; the count-back formula is applied nationwide with attribution) |
CSU states its spring rules relative to “the average last spring frost.” We use the 50% date as that average and also show the 30% and 10% anchors. See the methodology for details and limitations.
FAQ
When should I start seeds indoors in Las Vegas?
Start tomatoes Feb 14–28 and peppers Dec 24 – Jan 7. Both dates count back from a balanced (30%-risk) transplant date using CSU's transplant ages.
When should I plant tomatoes outside in Las Vegas?
Set tomatoes out about Apr 4. The date is the same at every risk level. CSU's rule of 2+ weeks after the average last frost would allow about Feb 7 here, but CSU also wants nights above 52°F, and the average nightly low at Las Vegas Air Terminal isn't above that until Apr 4.
What can I plant in Las Vegas in the fall?
Based on UNL Extension's count-back from the typical first frost (Dec 10), the deadlines are: peas by Sep 22; lettuce (leaf) by Sep 27; carrots by Sep 17; beans (snap) by Sep 13; summer squash by Sep 23; broccoli by Sep 22 (transplants); cabbage by Sep 2 (transplants); kohlrabi by Oct 7; green onions by Sep 27; radishes by Oct 27; spinach by Oct 17; turnips by Oct 7; beets by Sep 27; swiss chard by Sep 27; cucumbers by Sep 18.