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Cheyenne, WY Planting Calendar

The last spring frost in Cheyenne usually comes around May 13 and the first fall frost around Oct 5, a growing season of about 145 days. Start tomatoes indoors Apr 1 – Apr 15 and plant them outside May 27 – Jun 10.

Last spring frostMay 13
First fall frostOct 5
Growing season145 days

When to plant vegetables in Cheyenne

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesApr 1 – Apr 15May 27 – Jun 10—
PeppersMar 25 – Apr 8Jun 3 – Jun 17—
EggplantMar 25 – Apr 8Jun 3 – Jun 17—
Cucumbers—May 27 – Jun 10—
Zucchini & summer squash—May 27 – Jun 10—
Pumpkins & winter squash—Jun 3 – Jun 17—
Green beans—May 27 – Jun 10Jul 13 – Jul 27
Sweet corn—May 27 – Jun 10—
BasilApr 15 – Apr 29May 27 – Jun 10—
LettuceMar 18 – Apr 1Apr 15 – May 27Aug 10 – Aug 24
Spinach—Apr 1 – Apr 22Aug 10 – Aug 24
Peas—Apr 1 – Apr 22Jul 27 – Aug 10
Carrots—Apr 15 – May 20Jul 13 – Jul 27
Radishes—Apr 8 – May 27Aug 24 – Sep 7
BroccoliMar 4 – Mar 18Apr 15 – Apr 29Jul 13 – Jul 27
KaleMar 18 – Apr 1Apr 8 – Apr 22Jul 27 – Aug 10
Onions—Apr 15 – Apr 29—
Potatoes—Apr 22 – May 20—
Garlic——Sep 21 – Oct 26

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

Month-by-month planting in Cheyenne

  1. JanuaryPlan, order seeds and prepare beds.
  2. FebruaryPlan, order seeds and prepare beds.
  3. MarchStart indoors: Peppers, Eggplant, Lettuce, Broccoli, Kale
  4. AprilStart indoors: Tomatoes, Peppers, Eggplant, Basil, Lettuce, KalePlant outside: Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale, Onions, Potatoes
  5. MayPlant outside: Tomatoes, Cucumbers, Zucchini & summer squash, Green beans, Sweet corn, Basil, Lettuce, Carrots, Radishes, Potatoes
  6. JunePlant outside: Tomatoes, Peppers, Eggplant, Cucumbers, Zucchini & summer squash, Pumpkins & winter squash, Green beans, Sweet corn, Basil
  7. JulyPlant outside: Green beans, Peas, Carrots, Broccoli, Kale
  8. AugustPlant outside: Lettuce, Spinach, Peas, Radishes, Kale
  9. SeptemberPlant outside: Radishes, Garlic
  10. OctoberPlant outside: Garlic
  11. NovemberPlan, order seeds and prepare beds.
  12. DecemberPlan, order seeds and prepare beds.

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 Cheyenne?

The median last spring frost is May 13 and the median first fall frost is Oct 5, based on 2016–2025 weather data.

When should I plant tomatoes in Cheyenne?

Start seeds indoors Apr 1 – Apr 15 and set plants outside May 27 – Jun 10, once nights stay above 50°F.

When should I plant a fall garden in Cheyenne?

Sow or transplant cool-season crops 6 to 12 weeks before the first fall frost (around Oct 5): broccoli and carrots first, lettuce, spinach and radishes last.

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