Phoenix, Arizona falls into USDA planting zones 9b (25°F to 30°F / -3.9°C to -1.1°C) and 10a (30°F to 35°F / -1.1°C to 1.7°C) according to USDA data.
Zone 9b covers northern, western, and southern suburban areas, while Zone 10a dominates central and eastern regions like downtown Phoenix. This temperature split creates distinct gardening requirements: warmer urban cores support Zone 10a plants, and cooler outskirts suit Zone 9b species.
To find out your Phoenix, Arizona, USDA zone use our three tools given below, Zipcode to planting zone tool, easy to use location based interactive map or by searching planting zone table.
Phoenix Planting Zones by ZipCode
Phoenix planting zones map
Please Select or type your Phoenix location in the selection box below, to know its USDA Planting Zone.
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Phoenix Area Planting Zone
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Planting Zones
Phoenix Planting Zones Table
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Planting zones in Phoenix, Arizona
1. Zone 9b
Zone 9b, shown by the yellow colored areas on our map above, covers most areas of Phoenix, particularly in the northern, western, and southern outskirts of the city. While slightly cooler than the central areas, it still represents a warm climate suitable for a wide variety of plants.
Some key zip codes in Zone 9b include 85013, 85015, 85017, 85019, 85021, 85022, 85023, 85029, 85031, 85032, 85033, 85035, 85037, and 85043. These areas form a ring around the central part of Phoenix, indicating that the slightly cooler temperatures are often found in the suburban and peripheral regions of the city.
2. Zone 10a
Phoenix’s Zone 10a, shown in purple color on our map above, experiences average annual minimum temperatures of 30°F to 35°F (-1.1°C to 1.7°C), making it one of the warmest USDA planting zones in the continental U.S.
This zone covers central and eastern Phoenix, including downtown and zip codes like 85001, 85004, 85006, 85008, 85014, 85016, 85018, 85020, 85024, 85028, 85034, 85040, 85041, 85042, and 85044.
The urban heat island effect creates a distinct temperature pattern, with Zone 10a concentrated in densely developed urban areas and extending eastward, while Zone 9b encircles the city periphery.
Please note that both zones 9b and 10a are considered very warm by national standards, allowing Phoenix gardeners to grow a wide variety of heat-loving plants and even some tropical species.