U.S. Hardiness Zone Map and ZipCode Lookup
This map shows 11 different zones, each of which represents an area of winter hardiness for the plants of agriculture and our natural landscape. The corresponding temperatures represent the lowest temperatures that can be expected each year. When planning your garden you need to take planting zones and frost dates into consideration. Use this planting zone map as a general reference when determining what garden and landscape plants will survive the climate in your area.
|
ZONE |
Average Last Frost Date
Range |
Average First Frost Date
Range |
|
1 |
June 1 - June 30 |
July 1 - July 31* |
|
2 |
May 1 - May 31 |
Aug 1 - Aug 31 |
|
3 |
May 1 - May 31 |
Sept 1 - Sept 30 |
|
4 |
May 1 - May 30 |
Sept 1 - Sept 30 |
|
5 |
Mar 30 - Apr 30 |
Sept 30 - Oct 30 |
|
6 |
Mar 30 - Apr 30 |
Sept 30 - Oct 30 |
|
7 |
Mar 30 - Apr 30 |
Sept 30 - Oct 30 |
|
8 |
Feb 28 - Mar 30 |
Oct 30 - Nov 30 |
|
9 |
Jan 30 - Feb 28 |
Nov 30 - Dec 30 |
|
10 |
Jan 30 or before |
Nov 30 - Dec 30 |
|
11 |
Free of frost year around |
|
|
* Vulnerable to frost 365 days per
year |
|
Definitions of Degrees of Frosts /
Freezes |
|
Frost |
32+F degrees |
Damage depends upon the duration of the frost, humidity, topography,
etc. |
|
Light Freeze |
29F to 32F |
Tender plants are killed with little effect on other
vegetation |
|
Moderate Freeze |
25F to 28F |
Damage to most vegetation with heavier damage to fruit blossoms and
tender plants |
|
Severe (Hard) Freeze |
24F and colder |
Heavy damage to all but the hardiest of
plants |
|
