LawnWeather

Bozeman, MT Planting Calendar

The last spring frost in Bozeman usually comes around May 17 and the first fall frost around Oct 1, a growing season of about 137 days. Start tomatoes indoors Apr 5 – Apr 19 and plant them outside May 31 – Jun 14.

Last spring frostMay 17
First fall frostOct 1
Growing season137 days

When to plant vegetables in Bozeman

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesApr 5 – Apr 19May 31 – Jun 14—
PeppersMar 29 – Apr 12Jun 7 – Jun 21—
EggplantMar 29 – Apr 12Jun 7 – Jun 21—
Cucumbers—May 31 – Jun 14—
Zucchini & summer squash—May 31 – Jun 14—
Pumpkins & winter squash—Jun 7 – Jun 21—
Green beans—May 31 – Jun 14Jul 9 – Jul 23
Sweet corn—May 31 – Jun 14—
BasilApr 19 – May 3May 31 – Jun 14—
LettuceMar 22 – Apr 5Apr 19 – May 31Aug 6 – Aug 20
Spinach—Apr 5 – Apr 26Aug 6 – Aug 20
Peas—Apr 5 – Apr 26Jul 23 – Aug 6
Carrots—Apr 19 – May 24Jul 9 – Jul 23
Radishes—Apr 12 – May 31Aug 20 – Sep 3
BroccoliMar 8 – Mar 22Apr 19 – May 3Jul 9 – Jul 23
KaleMar 22 – Apr 5Apr 12 – Apr 26Jul 23 – Aug 6
Onions—Apr 19 – May 3—
Potatoes—Apr 26 – May 24—
Garlic——Sep 17 – Oct 22

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

Month-by-month planting in Bozeman

  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. MayStart indoors: BasilPlant outside: Tomatoes, Cucumbers, Zucchini & summer squash, Green beans, Sweet corn, Basil, Lettuce, Carrots, Radishes, Broccoli, Onions, 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

We may earn a commission when you buy through these links, at no extra cost to you. How this works

Frequently asked questions

When is the last frost in Bozeman?

The median last spring frost is May 17 and the median first fall frost is Oct 1, based on 2016–2025 weather data.

When should I plant tomatoes in Bozeman?

Start seeds indoors Apr 5 – Apr 19 and set plants outside May 31 – Jun 14, once nights stay above 50°F.

When should I plant a fall garden in Bozeman?

Sow or transplant cool-season crops 6 to 12 weeks before the first fall frost (around Oct 1): broccoli and carrots first, lettuce, spinach and radishes last.

More from Bozeman