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Green Bay, WI Planting Calendar

The last spring frost in Green Bay usually comes around May 4 and the first fall frost around Oct 19, a growing season of about 168 days. Start tomatoes indoors Mar 23 – Apr 6 and plant them outside May 18 – Jun 1.

Last spring frostMay 4
First fall frostOct 19
Growing season168 days

When to plant vegetables in Green Bay

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesMar 23 – Apr 6May 18 – Jun 1—
PeppersMar 16 – Mar 30May 25 – Jun 8—
EggplantMar 16 – Mar 30May 25 – Jun 8—
Cucumbers—May 18 – Jun 1—
Zucchini & summer squash—May 18 – Jun 1—
Pumpkins & winter squash—May 25 – Jun 8—
Green beans—May 18 – Jun 1Jul 27 – Aug 10
Sweet corn—May 18 – Jun 1—
BasilApr 6 – Apr 20May 18 – Jun 1—
LettuceMar 9 – Mar 23Apr 6 – May 18Aug 24 – Sep 7
Spinach—Mar 23 – Apr 13Aug 24 – Sep 7
Peas—Mar 23 – Apr 13Aug 10 – Aug 24
Carrots—Apr 6 – May 11Jul 27 – Aug 10
Radishes—Mar 30 – May 18Sep 7 – Sep 21
BroccoliFeb 23 – Mar 9Apr 6 – Apr 20Jul 27 – Aug 10
KaleMar 9 – Mar 23Mar 30 – Apr 13Aug 10 – Aug 24
Onions—Apr 6 – Apr 20—
Potatoes—Apr 13 – May 11—
Garlic——Oct 5 – Nov 9

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

Month-by-month planting in Green Bay

  1. JanuaryPlan, order seeds and prepare beds.
  2. FebruaryStart indoors: Broccoli
  3. MarchStart indoors: Tomatoes, Peppers, Eggplant, Lettuce, Broccoli, KalePlant outside: Spinach, Peas, Radishes, Kale
  4. AprilStart indoors: Tomatoes, 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, Broccoli, Kale
  9. SeptemberPlant outside: Lettuce, Spinach, Radishes
  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 Green Bay?

The median last spring frost is May 4 and the median first fall frost is Oct 19, based on 2016–2025 weather data.

When should I plant tomatoes in Green Bay?

Start seeds indoors Mar 23 – Apr 6 and set plants outside May 18 – Jun 1, once nights stay above 50°F.

When should I plant a fall garden in Green Bay?

Sow or transplant cool-season crops 6 to 12 weeks before the first fall frost (around Oct 19): broccoli and carrots first, lettuce, spinach and radishes last.

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