LawnWeather

St. George, UT Planting Calendar

The last spring frost in St. George usually comes around Mar 3 and the first fall frost around Nov 11, a growing season of about 253 days. Start tomatoes indoors Jan 20 – Feb 3 and plant them outside Mar 17 – Mar 31.

Last spring frostMar 3
First fall frostNov 11
Growing season253 days

When to plant vegetables in St. George

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesJan 20 – Feb 3Mar 17 – Mar 31—
PeppersJan 13 – Jan 27Mar 24 – Apr 7—
EggplantJan 13 – Jan 27Mar 24 – Apr 7—
Cucumbers—Mar 17 – Mar 31—
Zucchini & summer squash—Mar 17 – Mar 31—
Pumpkins & winter squash—Mar 24 – Apr 7—
Green beans—Mar 17 – Mar 31Aug 19 – Sep 2
Sweet corn—Mar 17 – Mar 31—
BasilFeb 3 – Feb 17Mar 17 – Mar 31—
LettuceJan 6 – Jan 20Feb 3 – Mar 17Sep 16 – Sep 30
Spinach—Jan 20 – Feb 10Sep 16 – Sep 30
Peas—Jan 20 – Feb 10Sep 2 – Sep 16
Carrots—Feb 3 – Mar 10Aug 19 – Sep 2
Radishes—Jan 27 – Mar 17Sep 30 – Oct 14
BroccoliDec 23 – Jan 6Feb 3 – Feb 17Aug 19 – Sep 2
KaleJan 6 – Jan 20Jan 27 – Feb 10Sep 2 – Sep 16
Onions—Feb 3 – Feb 17—
Potatoes—Feb 10 – Mar 10—
Garlic——Oct 28 – Dec 2

Dates count from the median frost dates (2016–2025) for St. George. In a cold spring, wait a week; in a warm one you can go a week early.

Month-by-month planting in St. George

  1. JanuaryStart indoors: Tomatoes, Peppers, Eggplant, Lettuce, Broccoli, KalePlant outside: Spinach, Peas, Radishes, Kale
  2. FebruaryStart indoors: Tomatoes, BasilPlant outside: Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale, Onions, Potatoes
  3. MarchPlant outside: Tomatoes, Peppers, Eggplant, Cucumbers, Zucchini & summer squash, Pumpkins & winter squash, Green beans, Sweet corn, Basil, Lettuce, Carrots, Radishes, Potatoes
  4. AprilPlant outside: Peppers, Eggplant, Pumpkins & winter squash
  5. MayPlan, order seeds and prepare beds.
  6. JunePlan, order seeds and prepare beds.
  7. JulyPlan, order seeds and prepare beds.
  8. AugustPlant outside: Green beans, Carrots, Broccoli
  9. SeptemberPlant outside: Green beans, Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale
  10. OctoberPlant outside: Radishes, Garlic
  11. NovemberPlant outside: Garlic
  12. DecemberStart indoors: BroccoliPlant outside: Garlic

Tools for this season

Seed starting kitTrays with humidity domes for starting seeds indoors.See options on AmazonLED grow lightKeeps indoor seedlings short and sturdy.See options on AmazonFrost clothCovers tender plants on a surprise frost night.See options on AmazonSoil thermometerCheck the soil at 4 inches before you spread anything.See options on Amazon

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Frequently asked questions

When is the last frost in St. George?

The median last spring frost is Mar 3 and the median first fall frost is Nov 11, based on 2016–2025 weather data.

When should I plant tomatoes in St. George?

Start seeds indoors Jan 20 – Feb 3 and set plants outside Mar 17 – Mar 31, once nights stay above 50°F.

When should I plant a fall garden in St. George?

Sow or transplant cool-season crops 6 to 12 weeks before the first fall frost (around Nov 11): broccoli and carrots first, lettuce, spinach and radishes last.

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