Author: Jagdish Reddy | 10+ Years Sustainable Gardening Experience
Verification: Cross-referenced with USDA Climate Data & University Research
Status: Verified for current US regional growing conditions
Last Updated: Nov, 2025

Arizona’s varying growing conditions, from Flagstaff’s short, frosty seasons to Phoenix’s long, blazing summers, make a universal planting guide unsuitable. This Arizona planting calendar is based on USDA zones, frost dates, and regional planting data, whether you’re in the low desert of Phoenix or Tucson, the high country around Prescott or Flagstaff, or the year-round warmth of Yuma, you’ll find planting times that actually work for your patch of dirt.

Instead of guessing, you’ll know when to plant in Arizona based on your local frost dates and seasonal rhythms. Need a reliable Arizona vegetable planting calendar? Wondering about the best Arizona planting dates for tomatoes, greens, or flowers? his guide provides a structured Arizona planting reference—no jargon, just practical timing backed by zone data.

From cool-season crops in the Valley to frost-sensitive perennials in mountain foothills, this calendar provides seasonal planting timing.

Follow each table to plan your garden confidently across Arizona’s diverse climates.

Arizona USDA Hardiness Zone Table

Arizona’s all over the map when it comes to growing conditions—thanks to those big swings in elevation. One town might be sweltering in the desert while another’s getting frost up in the mountains. That’s why nailing down your USDA hardiness zone is such a big deal. It helps you time your planting just right, so you’re not tossing seeds out there only to watch them fry—or freeze. Use the table below to find your zone and start growing at the right time for your patch in Arizona.

Region	USDA Zones	Notes
Northern AZ (Flagstaff)	4–6	Cold winters, late frost
Central Highlands (Prescott/Sedona)	6–7	Cooler climate, moderate frosts
Southern AZ (Phoenix/Tucson)	8–10	Long warm season
Western Desert (Yuma)	9–10	Very hot, minimal frost

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Arizona Frost Date Chart

Frost timing changes sharply between the mountains and desert valleys. Use this frost chart to decide when it is safe to start planting outdoors. Always consider microclimates around your home or garden.

City	Last Spring Frost	First Fall Frost
Phoenix	Feb 4–16	Nov 26–Dec 10
Tucson	Feb 5–20	Nov 20–Dec 5
Yuma	Frost-Free	Frost-Free
Prescott	May 1–20	Sep 20–Oct 10
Flagstaff	Jun 1–20	Sep 10–20

Arizona Climate Region Planting Table

Arizona’s regions experience different temperature patterns, rainfall levels, and seasonal lengths. This table helps match planting choices to your local environment. Each zone favors specific planting windows.

Region	Best Planting Season	Notes
Low Desert	Oct–Apr	Avoid mid-summer planting
High Desert	Mar–Jun, Aug–Sep	Cooler nights
Mountains	May–Sep	Short growing window

Arizona Soil Preparation Chart for Vegetable Gardens

Soils in Arizona include sandy desert soil, clay-heavy patches, and rocky ground. Preparing soil correctly improves water retention and root strength. Use this chart to amend soil based on your region.

Soil Type	Recommendation
Sandy	Add compost and organic matter
Alkaline	Add sulfur or peat moss
Clay	Add gypsum and compost.
Rocky	Use raised beds

Arizona Watering Calendar

Arizona’s watering needs change significantly depending on temperature and daylight. Use this seasonal watering guide to maintain consistent moisture without overwatering. Early morning is always best.

Season	Watering Frequency
Winter	1–2× per week
Spring/Fall	2–3× per week
Summer	Daily or every other day

Arizona Heat & Frost Protection Chart

High heat and occasional frost both affect Arizona gardens. This chart provides simple methods to protect crops during extreme conditions. Small adjustments help maintain plant health.

Condition	Protection Method
Extreme Heat	40–60% shade cloth
Light Frost	Row covers
Hard Frost	Mulch and insulation
Dry Wind	Windbreak barriers

Arizona Cool-Season Vegetable Planting Calendar

Cool-season crops thrive from fall through early spring. This table gives the best planting windows for greens and root crops before summer heat arrives. This method is ideal for low-desert winter gardening.

Vegetable	Planting Window
Lettuce	Sep–Apr
Spinach	Oct–Feb
Peas	Jan–Mar, Sep–Nov
Carrots	Sep–Mar
Broccoli	Sep–Feb
Cauliflower	Sep–Jan
Cabbage	Sep–Feb
Radish	Sep–Apr
Beets	Sep–Mar

Garden Planner Tool

Plan your garden layout using this interactive planner. Enter your garden size to calculate plant spacing and planting timing based on this planting calendar.

This planner helps turn the planting calendar above into a practical garden layout based on your available space.

Arizona Warm-Season Vegetable Planting Calendar

Warm-season crops grow best in Arizona’s long spring and early fall seasons. Avoid planting during the hottest part of summer unless recommended. Use this table for timing heat-loving vegetables.

Vegetable	Planting Window
Tomatoes	Feb–Apr, Jul–Aug
Peppers	Feb–Apr
Eggplant	Feb–Apr
Beans	Mar–Apr, Aug–Sep
Cucumbers	Mar–Apr, Aug–Sep
Squash	Mar–Apr, Aug
Melons	Mar–Apr
Corn	Feb–Apr

Arizona Herb Planting Calendar

Herbs grow well in Arizona’s cooler months, though some tolerate heat with shade. Use this table to schedule herb planting throughout the year.

Herb	Planting Window
Basil	Mar–Apr, Aug
Mint	Oct–Apr
Parsley	Sep–Mar
Cilantro	Oct–Feb
Rosemary	Year-round (avoid peak summer)
Thyme	Oct–Apr
Oregano	Oct–Apr

Arizona Flower Planting Calendar

Flowers grow best when planted according to seasonal temperature patterns. Cool-season flowers thrive from fall through spring, while warm-season flowers perform well in spring and early summer.

Warm-Season Flowers

Flower	Planting Window
Zinnia	Mar–Apr
Marigold	Feb–Apr
Sunflower	Feb–Apr
Portulaca	Mar–Jun

Cool-Season Flowers

Flower	Planting Window
Pansy	Oct–Feb
Petunia	Oct–Feb
Snapdragons	Oct–Mar
Dianthus	Oct–Mar

Arizona Fruit Tree Planting Calendar

Fruit trees perform best when planted during Arizona’s cooler months. Use this table to select the right planting window and reduce transplant stress.

Fruit Tree	Planting Window
Citrus	Feb–Mar
Fig	Feb–Apr
Peach	Jan–Feb
Apple	Jan–Feb
Pomegranate	Feb–Mar
Plum	Jan–Feb

Arizona Native Plant Planting Calendar

Native plants are adapted to Arizona’s heat, drought, and soil conditions. Planting during cooler months promotes strong root development.

Native Plant	Planting Window
Desert Marigold	Oct–Apr
Brittlebush	Oct–Apr
Red Yucca	Oct–Apr
Desert Willow	Feb–Apr

Arizona Container Planting Calendar

Container gardening allows better control over soil and heat exposure. Use this table to plan container-friendly crops throughout the year.

Plant Type	Notes
Herbs	Best Oct–Apr
Lettuce	Ideal Oct–Mar
Tomatoes	Use 5–10 gal pots
Peppers	Provide shade in summer

Arizona Seed-Starting Calendar

Seed starting indoors helps gardeners get ahead of frost dates in cooler regions. This table shows when to begin seeds and transplant outdoors.

Crop	Start Indoors	Transplant
Tomatoes	Jan–Feb	Feb–Apr
Peppers	Jan–Feb	Mar–Apr
Eggplant	Jan–Feb	Mar–Apr
Broccoli	Aug–Sep	Sep–Oct

Arizona Transplanting Calendar

Transplanting correctly helps seedlings establish quickly. Use this table to determine the best outdoor transplant times.

Crop	Transplant Window
Tomatoes	Feb–Apr
Peppers	Mar–Apr
Eggplant	Mar–Apr
Lettuce	Oct–Feb
Broccoli	Sep–Oct

Arizona Month-by-Month Planting Calendar

This section provides a simple month-by-month breakdown for quick reference. Use it to plan seasonal gardening tasks throughout the year.

January

Plant vegetables such as peas, carrots, radishes, beets, lettuce, and spinach.

February

Transplant tomatoes and peppers; plant beans, cucumbers, and melons.

March

Plant corn, squash, cucumbers, tomatoes, and zinnia.

April

Plant melons, beans, okra, and sunflowers.

May

Plant only heat-tolerant crops like okra.

June

Avoid planting; focus on shade and protection.

July

Start fall tomatoes; prepare for monsoon planting.

August

Plant beans, cucumbers, and squash for fall.

September

Plant cool-season crops like lettuce, broccoli, and peas.

October

Plant carrots, radishes, beets, herbs, and winter flowers.

November

Continue planting greens and peas.

December

This month is perfect for planting root crops, leafy greens, and cool herbs.

Data sources

USDA Plant Hardiness Zone Map
NOAA Frost Probability Data
University of Arizona Extension Planting Guides

For planting guidance in other regions

You can also view our California Planting Calendar, Texas Planting Calendar, and Florida Planting Calendar.