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Prescott, AZ Planting Calendar

The last spring frost in Prescott usually comes around May 6 and the first fall frost around Oct 20, a growing season of about 167 days. Start tomatoes indoors Mar 25 – Apr 8 and plant them outside May 20 – Jun 3.

Last spring frostMay 6
First fall frostOct 20
Growing season167 days

When to plant vegetables in Prescott

VegetableStart seeds indoorsPlant outsideFall crop
TomatoesMar 25 – Apr 8May 20 – Jun 3—
PeppersMar 18 – Apr 1May 27 – Jun 10—
EggplantMar 18 – Apr 1May 27 – Jun 10—
Cucumbers—May 20 – Jun 3—
Zucchini & summer squash—May 20 – Jun 3—
Pumpkins & winter squash—May 27 – Jun 10—
Green beans—May 20 – Jun 3Jul 28 – Aug 11
Sweet corn—May 20 – Jun 3—
BasilApr 8 – Apr 22May 20 – Jun 3—
LettuceMar 11 – Mar 25Apr 8 – May 20Aug 25 – Sep 8
Spinach—Mar 25 – Apr 15Aug 25 – Sep 8
Peas—Mar 25 – Apr 15Aug 11 – Aug 25
Carrots—Apr 8 – May 13Jul 28 – Aug 11
Radishes—Apr 1 – May 20Sep 8 – Sep 22
BroccoliFeb 25 – Mar 11Apr 8 – Apr 22Jul 28 – Aug 11
KaleMar 11 – Mar 25Apr 1 – Apr 15Aug 11 – Aug 25
Onions—Apr 8 – Apr 22—
Potatoes—Apr 15 – May 13—
Garlic——Oct 6 – Nov 10

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

Month-by-month planting in Prescott

  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, 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 Prescott?

The median last spring frost is May 6 and the median first fall frost is Oct 20, based on 2016–2025 weather data.

When should I plant tomatoes in Prescott?

Start seeds indoors Mar 25 – Apr 8 and set plants outside May 20 – Jun 3, once nights stay above 50°F.

When should I plant a fall garden in Prescott?

Sow or transplant cool-season crops 6 to 12 weeks before the first fall frost (around Oct 20): broccoli and carrots first, lettuce, spinach and radishes last.

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