Have you ever thought about your planting zones?
Your Planting Zones
A zone map is chock full of general guidelines you'll need for your garden plans.
When you know the
planting zones in which you live, you can base your yard care and choice of flowers and plants on smart decisions.
Match your zone with tips from our flower
guide to pick the plants that fit your gardening zones. Generally, the last freeze of spring determines when you can plant, and the first one in the fall brings an end to most flower and vegetable growth.
What Are Planting Zones?
The planting zones, also called hardiness
zones, divide the United States, Mexico and Canada into 11 areas. Each of
the gardening zones is based on a 10 degree Fahrenheit difference in the average
annual minimum temperature.
Planting Zones 1 and 2a, the coldest, represent
Canada. The United States falls within zones 2 through 10. Hawaii
and Mexico are represented by zone 11, the hottest zone.
||Fairbanks, Alaska; Northwest Territories (Canada)
||-50 to -45
||-42.8 to -45.5
||Prudhoe Bay, Alaska; Flin Fon, Menitoba (Canada)
||-45 to -40
||-40.0 to -42.7
||Unalakleet, Alaska; Pinecreek Minnesota
||-40 to -35
||-37.3 to -39.9
||International Falls, Minnesota; St. Michael, Alaska
||-35 to -30
||-34.5 to -37.2
||Tomahawk, Wisconsin; Sidney, Montana
||-30 to -25
||-31.7 to -34.4
||St. Paul, Minnesota; Lewistown, Montana
||-25 to -20
||-28.9 to -31.6
||Northwood, Iowa; Nebraska
||-20 to -15
||-26.2 to -28.8
||Des Moines, Iowa; Illinois
||-15 to -10
||-23.4 to -26.1
||Columbia, Missouri; Mansfield, Pennsylvania
||-10 to -5
||-20.6 to -23.3
||St. Louis, Missouri; Lebanon, Pennsylvania
||-5 to 0
||-17.8 to -20.5
||McMinnville, Tennessee; Branson, Missouri
||0 to 5
||-15.0 to -17.7
||Oklahoma City, Oklahoma; South Boston, Virginia
||5 to 10
||-12.3 to -14.9
||Little Rock, Arkansas; Griffin, Georgia
||10 to 15
||-9.5 to -12.2
||Tifton, Georgia; Dallas, Texas
||15 to 20
||-6.7 to -9.4
||Austin, Texas; Gainesville, Florida
||20 to 25
||-3.9 to -6.6
||Houston, Texas; St. Augustine, Florida
||25 to 30
||-1.2 to -3.8
||Brownsville, Texas; Fort Pierce, Florida
||30 to 35
||1.6 to -1.1
||Naples, Florida; Victorville, California
||35 to 40
||4.4 to 1.7
||Miami, Florida; Coral Gables, Florida
||Honolulu, Hawaii; Mazatlan, Mexico
The 2003 US National Arboretum USDA Plant Hardiness Zone Map
USDA Miscellaneous Publication No. 1475, Issued January 1990
Last Updated February 23, 2004
Take a look at the above zone chart.
You'll see the lowest average temperature in Zone 2 is -50 to -40 degrees
Fahrenheit, while the lowest average temperature in zone 10 is +30 to +40
hardiness means a plant can be expected to
grow in the zone's temperature
as determined by the lowest average annual temperature.
Here's an example: If your plant is
recommended for a range of gardening zones, the plant is said to be "hardy" in those zones. Let's say zones 5 - 9 are suggested for your
perennial. Then you know this plant is suitable for growing in zones 5,
6, 7, 8 and 9.
complete information about every area of the United States, go to the USDA
official planting zones map (a new
window will open). Once there, either click
on your region on the map, or click on your state's abbreviation. You'll go
right to specific regional information about your zone.
Planting Zone Map On The Way!
USDA zone map will change within the next year... their current map is
based on statistics that are over 20 years old. We've all noticed our climate
has warmed during that time, and our zones will likely be reclassified.
Be assured that we will stay up to date with the most current official
Forget Your Local Features...
Local conditions may also affect the life and
health of your plants and lawn. So consider your zones together with
your location's own features such as humidity, moisture, drainage, soil,
fertility, and winds.
Do you know the zones for most
rosebushes? Actually, most roses are hardy in zones 4-9, with some hardy in
zones 5-9. You'll discover this and so many more essential rose-growing facts
when you learn
rose gardening with us!