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Colorado Springs, CO Planting Calendar

The last spring frost in Colorado Springs usually comes around May 8 and the first fall frost around Oct 12, a growing season of about 157 days. Start tomatoes indoors Mar 27 – Apr 10 and plant them outside May 22 – Jun 5.

Last spring frostMay 8
First fall frostOct 12
Growing season157 days

When to plant vegetables in Colorado Springs

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesMar 27 – Apr 10May 22 – Jun 5—
PeppersMar 20 – Apr 3May 29 – Jun 12—
EggplantMar 20 – Apr 3May 29 – Jun 12—
Cucumbers—May 22 – Jun 5—
Zucchini & summer squash—May 22 – Jun 5—
Pumpkins & winter squash—May 29 – Jun 12—
Green beans—May 22 – Jun 5Jul 20 – Aug 3
Sweet corn—May 22 – Jun 5—
BasilApr 10 – Apr 24May 22 – Jun 5—
LettuceMar 13 – Mar 27Apr 10 – May 22Aug 17 – Aug 31
Spinach—Mar 27 – Apr 17Aug 17 – Aug 31
Peas—Mar 27 – Apr 17Aug 3 – Aug 17
Carrots—Apr 10 – May 15Jul 20 – Aug 3
Radishes—Apr 3 – May 22Aug 31 – Sep 14
BroccoliFeb 27 – Mar 13Apr 10 – Apr 24Jul 20 – Aug 3
KaleMar 13 – Mar 27Apr 3 – Apr 17Aug 3 – Aug 17
Onions—Apr 10 – Apr 24—
Potatoes—Apr 17 – May 15—
Garlic——Sep 28 – Nov 2

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

Month-by-month planting in Colorado Springs

  1. JanuaryPlan, order seeds and prepare beds.
  2. FebruaryStart indoors: Broccoli
  3. MarchStart indoors: Tomatoes, Peppers, Eggplant, Lettuce, Broccoli, KalePlant outside: Spinach, Peas
  4. AprilStart indoors: Tomatoes, Peppers, Eggplant, BasilPlant outside: Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale, Onions, Potatoes
  5. MayPlant outside: Tomatoes, Peppers, Eggplant, Cucumbers, Zucchini & summer squash, Pumpkins & winter 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, Carrots, Broccoli
  8. AugustPlant outside: Green beans, Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale
  9. SeptemberPlant outside: Radishes, Garlic
  10. OctoberPlant outside: Garlic
  11. NovemberPlant outside: Garlic
  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 Colorado Springs?

The median last spring frost is May 8 and the median first fall frost is Oct 12, based on 2016–2025 weather data.

When should I plant tomatoes in Colorado Springs?

Start seeds indoors Mar 27 – Apr 10 and set plants outside May 22 – Jun 5, once nights stay above 50°F.

When should I plant a fall garden in Colorado Springs?

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

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