🗺️ USDA Hardiness Zone Tool

Find Your PlantHardiness ZoneClimate-Based Garden Planning

Discover your USDA hardiness zone and the best flowers for your climate. Interactive zone mapping with personalized plant recommendations.

11 Zones

Complete Coverage

USA & Territories

Full Geographic

Temperature Data

Precise Ranges

Plant Match

Perfect Selection

Explore All Zones

USDA hardiness zone map showing optimal growing regions for different flower types

Zone Match

Perfect plants

Smart Zone Tools

Advanced ZoneFeatures

Our comprehensive zone tools provide precise climate data and personalized plant recommendations for successful gardening.

Interactive Zone Finder

Enter your ZIP code to instantly find your exact hardiness zone

KEY BENEFITS:

Accurate location data

Personalized recommendations

Local climate info

Climate Analysis

Detailed temperature ranges and seasonal patterns for your area

KEY BENEFITS:

Average frost dates

Temperature extremes

Seasonal planning

Plant Recommendations

Curated flower lists perfectly matched to your specific zone

KEY BENEFITS:

Guaranteed hardiness

Optimal performance

Seasonal success

Complete Zone Guide

USDA HardinessZone Details

Comprehensive information for each hardiness zone including temperature ranges, regional characteristics, and optimal flower recommendations.

Zone 1

Below -50°F

SEASON:

2-3 months

POPULATION:

Very limited

Typical Regions:

Northern Alaska, High Arctic

Best Flowers:

Arctic poppyMoss campionMountain avens

Challenges:

•Extreme cold
•Very short season
•Permafrost

Expert Tips:

Focus on alpine and arctic native plants. Use cold frames and greenhouses.

Zone 2

-50°F to -40°F

SEASON:

3-4 months

POPULATION:

Sparse

Typical Regions:

Central Alaska, Northern Canada

Best Flowers:

Siberian irisArctic lupineFireweed

Challenges:

•Severe cold
•Short growing season
•Limited daylight

Expert Tips:

Emphasize cold-hardy perennials. Start seeds indoors early.

Zone 3

-40°F to -30°F

SEASON:

4-5 months

POPULATION:

Rural communities

Typical Regions:

Northern Minnesota, Northern Maine, Mountain West

Best Flowers:

Purple coneflowerBlack-eyed SusanHardy hibiscus

Challenges:

•Very cold winters
•Late spring frosts
•Early fall frosts

Expert Tips:

Choose extremely hardy perennials. Use season extenders like row covers.

Zone 4

-30°F to -20°F

SEASON:

5-6 months

POPULATION:

Major northern cities

Typical Regions:

Minneapolis, Burlington, Northern Great Plains

Best Flowers:

PeonyDaylilyHardy rosesDelphinium

Challenges:

•Cold winters
•Variable spring weather
•Short summers

Expert Tips:

Focus on reliable hardy perennials. Plan for 4-season interest.

Zone 5

-20°F to -10°F

SEASON:

6-7 months

POPULATION:

Many major cities

Typical Regions:

Chicago, Boston, Denver, Salt Lake City

Best Flowers:

LilyIrisClematisHostaMost perennials

Challenges:

•Unpredictable spring
•Occasional harsh winters

Expert Tips:

Great variety possible. Use mulch for winter protection.

Zone 6

-10°F to 0°F

SEASON:

7-8 months

POPULATION:

Major metropolitan areas

Typical Regions:

New York, Philadelphia, St. Louis, Seattle

Best Flowers:

RoseAzaleaCamelliaMost annuals and perennials

Challenges:

•Variable weather
•Occasional severe winters

Expert Tips:

Excellent zone for diverse gardening. Protect marginally hardy plants.

Zone 7

0°F to 10°F

SEASON:

8-9 months

POPULATION:

Large cities and suburbs

Typical Regions:

Washington DC, Virginia, Northern Texas, Oklahoma

Best Flowers:

MagnoliaCamelliaCrape myrtleExtended rose varieties

Challenges:

•Hot summers
•Occasional cold snaps

Expert Tips:

Focus on heat tolerance. Provide afternoon shade in summer.

Zone 8

10°F to 20°F

SEASON:

9-10 months

POPULATION:

Major southern cities

Typical Regions:

Atlanta, Dallas, Austin, Coastal areas

Best Flowers:

OleanderBougainvilleaLantanaHeat-tolerant varieties

Challenges:

•High heat and humidity
•Drought conditions

Expert Tips:

Emphasize drought tolerance. Plan for two growing seasons.

Zone 9

20°F to 30°F

SEASON:

10-11 months

POPULATION:

Warm climate cities

Typical Regions:

Houston, New Orleans, Phoenix, Central Florida

Best Flowers:

HibiscusBird of paradisePassion vineTropical varieties

Challenges:

•Extreme heat
•High humidity
•Intense sun

Expert Tips:

Choose tropical and subtropical plants. Provide shade and water.

Zone 10

30°F to 40°F

SEASON:

Year-round

POPULATION:

Tropical regions

Typical Regions:

South Florida, Hawaii, Southern California

Best Flowers:

PlumeriaOrchidAnthuriumYear-round tropicals

Challenges:

•No frost tolerance needed
•Tropical pests
•Hurricane damage

Expert Tips:

Focus on tropical plants. Protect from wind and storms.

Zone 11

Above 40°F

SEASON:

Year-round

POPULATION:

Island and coastal tropical

Typical Regions:

Keys, Hawaii, Puerto Rico

Best Flowers:

Native tropicalsContinuous bloomersSalt-tolerant varieties

Challenges:

•No winter dormancy
•Constant heat
•Salt air

Expert Tips:

Embrace tropical gardening. Focus on native and adapted species.

City Reference Guide

Major CitiesZone Reference

Quick zone lookup for major US cities to help identify your hardiness zone.

Anchorage, AK

Zone 4b

-20°F to -15°F

Minneapolis, MN

Zone 4a

-30°F to -25°F

Chicago, IL

Zone 5b

-10°F to -5°F

New York, NY

Zone 7a

0°F to 5°F

Washington, DC

Zone 7a

0°F to 5°F

Atlanta, GA

Zone 7b

5°F to 10°F

Dallas, TX

Zone 8a

10°F to 15°F

Houston, TX

Zone 9a

20°F to 25°F

Phoenix, AZ

Zone 9b

25°F to 30°F

Miami, FL

Zone 10b

35°F to 40°F

Los Angeles, CA

Zone 10a

30°F to 35°F

Honolulu, HI

Zone 11

Above 40°F