What And Where Are The Usda Plant Hardiness Zones?

Filed Under: Temperature & Hardiness Zones · Keywords: What, Where, USDA Plant Hardiness Zones, Map · 978 Views
Where exactly are the gardening zones? We live in middle Tennessee near Cookeville.

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Answer #2 · Charles Dawson's Answer · Hello Jack...Brent is absolutely correct...and just one more additional piece of info on the USDA's Hardiness Zone mapping: the USDA typically updates these maps on an annual basis, using the average low temperature data for the previous 10 years. So, as an example, when the 2014 map is generated and published, the data for 2013 will be included (actually 2004-2013 data is included), and the data from 2003 (which was part of the previous year's mapping database) drops out...

This is why you typically see small fluctuations in the mapping demarcation when comparing one year's map to another (especially if the low temperature data for the year that is dropping off / being added was unusually high or low).

Hopefully, this makes for a better understanding of the mapping as a whole.

Best regards...)

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Answer #1 · Gardenality.com's Answer · Hi Jack - The USDA Plant Hardiness Zones are indicated on a map and are based on the average low temperatures that are experienced in a specific geographical area. According to the most updated 2012 map, Cookeville, TN is listed in Zone 7a...on the border of 6b, which experiences a lowest temperature from 0 to 5 degrees during the winter.

You'll find a link to the Hardiness Zones Map and descriptions page in the top right corner of this and every page in Gardenality.

Here's a link to the USDA website where you can find out more information about the Zones:


Let us know if you have any other questions.


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