Arizona Gardening Guide (2026)

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

USDA hardiness zone
4โ€“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 4โ€“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 4โ€“10, last frost โ‰ˆ Mar 1, first frost โ‰ˆ Dec 1, 275-day season), your Tomato plan:

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

Month-by-month (Arizona, 2026)

MonthAction
JanStart indoors
Febโ€”
MarSow ยท Transplant
Aprโ€”
MayHarvest
Junโ€”
Julโ€”
Augโ€”
Sepโ€”
Octโ€”
Novโ€”
Decโ€”

Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3โ€“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 โ†’

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 4โ€“10:

CropTypeSpacingDays to harvest
TomatoWarm-season24โ€ณ70
PepperWarm-season18โ€ณ75
LettuceCool-season8โ€ณ45
CarrotCool-season3โ€ณ65
Green BeansWarm-season4โ€ณ55
SpinachCool-season6โ€ณ40
CucumberWarm-season12โ€ณ55
ZucchiniWarm-season36โ€ณ50
KaleCool-season12โ€ณ55
BroccoliCool-season18โ€ณ70

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.