Arizona Gardening Guide (2026)

Desert lowlands vs cool high country. Water conservation and heat-tolerant varieties are key.

⏳ Garden countdownToday: Sep 25

USDA 2023 zones + NOAA 1991-2020 frost normals. Estimates — check your local forecast before planting.

USDA hardiness zone
4–10
Region
Southwest
Typical last spring frost
03/01
Typical first fall frost
12/01
Frost-free season
275 days
Lawn grass type
Warm-season

Quick answer (Arizona): Most of the state gardens in USDA zones 4–10 with about a 275-day frost-free window. Plan around the typical last frost of 03/01; start warm-season crops indoors ~6 weeks earlier. Source: USDA Plant Hardiness Zone Map (2023) + state cooperative extension typical freeze dates.

Your Arizona planting calendar

Pre-filled for Arizona. Pick a crop to see indoor start, sow/transplant, and harvest dates you can print.

In Arizona (typical zone 4–10), last frost ≈ Mar 1, first frost ≈ Dec 1 (275-day season), your Tomato plan:

Start seeds indoors
Jan 18
Sow / transplant outdoors
Mar 15
First harvest
May 24
Spacing / depth
24″ / 0.25″

Month-by-month (Arizona, 2026)

MonthAction
JanStart indoors
Feb—
MarSow · Transplant
Apr—
MayHarvest
Jun—
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—

Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3–13 suitable. Dates are typical; confirm with your county extension and watch the 10-day forecast.

Lawns in Arizona

Best grass types for your climate:

BermudagrassZoysiagrassSt. AugustinegrassBuffalograss

Open the lawn care scheduler →

Common pests in Arizona

The pests most reported in your region, with organic-first treatments:

WhiteflyAphidsLeaf-Footed BugGrasshopper

Whitefly

Targets
Tomato, ornamentals, greenhouse crops
Signs
Tiny white flies erupt when foliage disturbed; sticky leaves.
Organic / IPM first
Yellow sticky traps; insecticidal soap; Encarsia wasps.
Chemical option (follow label)
Pyriproxyfen or imidacloprid for severe cases.
Prevention
Avoid overhead watering; remove infested leaves.

What grows well in Arizona

Crops suitable for zones 4–10:

CropTypeSpacingDays to harvest
TomatoWarm-season24″70
PepperWarm-season18″75
LettuceCool-season8″45
CarrotCool-season3″65
Green BeansWarm-season4″55
SpinachCool-season6″40
CucumberWarm-season12″55
ZucchiniWarm-season36″50
KaleCool-season12″55
BroccoliCool-season18″70

Figures are typical (30-year normals) from USDA and state extension services. Always confirm your local last/first freeze and product labels with your county extension before acting.

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