Carefree, AZ Frost Dates & Growing Season

The two dates every Carefree garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Feb 4
~50% chance of frost after
First fall frost
Dec 16
~50% chance of frost before
Growing season
315 days
frost-free stretch
USDA zone
≈ 9b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 3 Feb 4 Mar 9
First fall frost Jan 15 Dec 16 Nov 24
Hard freeze (28°F), median last Jan 14 · first Jan 1

Computed from NOAA 1991–2020 climate normals at the CAREFREE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Carefree

Computed from Carefree's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Dec 10 – Dec 24 Feb 11 – Feb 18
🫑 Peppers Nov 26 – Dec 10 Feb 18 – Feb 25
🥬 Lettuce Dec 24 – Jan 7 Jan 7 – Jan 21 Jan 7 – Feb 4
🫛 Peas Dec 24 – Jan 7
🥕 Carrots Jan 14 – Feb 4
🥦 Broccoli Dec 17 – Dec 31 Jan 14 – Jan 28
🥬 Kale Dec 24 – Jan 7 Jan 7 – Jan 21 Jan 7 – Jan 21
🥒 Cucumbers Jan 7 – Jan 14 Feb 11 – Feb 18 Feb 11 – Feb 18
🥒 Zucchini Jan 7 – Jan 14 Feb 11 – Feb 18 Feb 11 – Feb 18
🫘 Green Beans (Bush) Feb 11 – Feb 18
🌽 Sweet Corn Feb 11 – Feb 18
🌿 Basil Dec 24 – Jan 7 Feb 11 – Feb 18 Feb 18 – Feb 25
🧄 Garlic Fall: Nov 4 – Dec 2

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Carefree's dates automatically after a lookup.

Reading the season in Carefree

With roughly 315 frost-free days, Carefree gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 16 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Carefree, AZ?

The average last spring frost in Carefree is around Feb 4, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Carefree, AZ?

The average first fall frost in Carefree arrives around Dec 16. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Carefree?

About 315 frost-free days on average, from Feb 4 to Dec 16. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Carefree in?

USDA zone 9b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.