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USDA Hardiness Zone Maps
The USDA Plant Hardiness Zones divide the United States
and southern Canada into 11 areas based on a 10 degree
Fahrenheit difference in the average annual minimum
temperature
.
USDA Hardiness Zone Maps
AK,
AL,
AR,
AZ,
CA,
CO,
CT,
DE,
FL,
GA,
HI,
IA,
ID,
IL,
IN,
KS,
KY,
LA,
MA,
MD,
ME,
MI,
MN,
MO,
MS,
MT,
NC,
ND,
NE,
NH,
NJ,
NM,
NV,
NY,
OH,
OK,
OR,
PA,
RI,
SC,
SD,
TN,
TX,
UT,
VA,
VT,
WA,
WI,
WV,
WY,
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Using the Maps:
A map of the U.S. is the beginning
key to selecting the hardiness zone to be used in the search.
The maps provided include a detailed, color-coded
breakdown by hardiness zone for each state.
Zones 2 through 10 have been subdivided into light- and dark-
colored sections that represent 5-degree differences WITHIN
the 10-degree zone. The lighter color is the colder section;
the darker color is the warmer section. These subdivisions
are intended to further help the user define the average
minimum temperature for his or her area. However, the plant
search is conducted on the whole number zone range.
If the precise location of your site borders another
hardiness zone, you should search twice:
first, on the colder zone (lower number),
secondly on the warmer zone (higher number).
Because cold tolerance is so important, it is better to select
plants which will be MORE cold-tolerant rather than less. For
example, for a site in zone 7 which borders zone 6: search
first for zone 6 plants, secondly on zone 7 plants.
Notice: The information contained on the following web pages is derived from industry sources which are considered reliable.
Information is subject to change and withdrawal without notice; therefore, it is the responsibility of the consumer to verify reliability on an individual
basis based on specific consumer needs. We assume no responsibility, and extend no guarantees for information provided.
Trademarked names are used in an editorial context with no intent of trademark infringement.
© 1995-2007 the Growit Network, all rights reserved.
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