Create Your Garden

Hardiness Zones in the USA

Regional Gardening, USA Hardiness Zones, Plant Hardiness

USA Hardiness Zones, Map of Hardiness Zones, hardiness zones, USDA Hardiness Zones, plant hardiness zones, Regional Gardening, Gardening in the USA

USDA Hardiness Zones

Based on the minimum ten-year average winter temperatures, plant hardiness zone maps have been progressively developed, first by the Department of Agriculture (USDA) for the United States and then more or less applied to the rest of the planet. The purpose of these hardiness zones is to identify how well plants will withstand the cold winter temperatures of these zones.

  • The USDA Hardiness Zone Map divides North America into 13 zones of 10°F each, ranging from -60°F (-51°C) to 70°F (21°C). If you are planning to buy a shrub, perennial, or tree, you need to make sure that this new plant will tolerate year-round conditions in your area. Therefore, to ensure your new acquisition will survive and grow year after year, you will need to compare the hardiness zone of your area with the hardiness zone of your plant (included in most American reference books, nursery catalogs, and gardening magazines describing plants).
  • Keep in mind, however, that this USDA map is mostly a guideline. While the USDA map reflects pretty well the garden climates of the eastern half of North America, it does not factor in any elevation or precipitation which have quite an impact on western climates. It does not include microclimates, humidity, or summer heat tolerance either.

Selecting plants suited to your climate will be a key step to success. If you know your hardiness zone, find the best plants or exciting garden ideas for your geographic area.

USA Hardiness Zones, Map of Hardiness Zones, hardiness zones, USDA Hardiness Zones, plant hardiness zones, Regional Gardening, Gardening in the USA

Find the best plants or exciting garden ideas for your hardiness zone

Guide Information

Hardiness 2 - 13
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.

Related Items

Please Login to Proceed

You Have Reached The Free Limit, Please Subscribe to Proceed

Subscribe to Gardenia

To create additional collections, you must be a paid member of Gardenia
  • Add as many plants as you wish
  • Create and save up to 25 garden collections
Become a Member

Plant Added Successfully

You have Reached Your Limit

To add more plants, you must be a paid member of our site Become a Member

Update Your Credit
Card Information

Cancel

Create a New Collection

Sign Up to Our Newsletter

    You have been subscribed successfully

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Find your Hardiness Zone

    Find your Heat Zone

    Find your Climate Zone