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The Updated Plant Hardiness Zone Map

The Updated Plant Hardiness Zone Map

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Happy New Year! The New Year brings new opportunities and new ideas in the garden. It is the time to experiment with new plants, new garden methods or a new landscape design. You may be looking through garden catalogs for new plants to try in the garden. Fortunately, there is a new USDA Plant Hardiness Zone Map that will prove invaluable in this decision making process.

he USDA Plant Hardiness Zone Map is a helpful resource. However, the map alone will not guarantee success. Data for the new map was collected from over 13,000 weather stations from 1991-2020. The zones are based on 30-year averages of weather extremes. The zones range from 1 (coldest) to 13 (warmest). The zones are divided into half zones and identified as ‘a’ and ‘b’. Two new zones were added to the map. The new zones are designated 12 and 13 for Puerto Rico and Hawaii. These zones will aid gardeners in deciding when to bring tropical plants indoors.

According to the 2012 Plant Hardiness Zone Map, Memphis was 7b which has a minimum average temperature of 5 to 10°F. The 2023 Plant Hardiness Zone Map now has Memphis as 8a which has a minimum average temperature of 10 to 15°F. This represents a temperature change of +3°F from 2012-2023.

The USDA Plant Hardiness Zone Map is an interactive map. Simply enter your zip code in the search box and it will find your location on the map. Here is the link to the 2023 USDA Plant Hardiness Zone Map: https://planthardiness.ars.usda.gov. TIP – Follow the instructions for use listed below the map.

Please visit the updated map and explore how to use it. If you have any questions about plant selections for our updated zone, please don’t hesitate to give me a call at 901-752-1207. We have resources that can help. I hope you have a successful gardening year!

PHOTO CREDIT: GIS BASED MAP

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