Why wait...
get growing!!
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| Excellent
for vegetables
~ Vegetables & Fruit ~ Tomatoes, Squash, Melons,
Peppers, Pumpkins, Onions, Cucumbers and more
Home Gardens
Use with shrubs and perrenial planting's to eliminate competition from weeds and give your plants a stronger start.
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Helpful Info: Hardiness Zones Home Gardening Info (Soil), (Sunlight)
USDA & Arbor Day.Org Hardiness Zones Map
Rollover image to compare, Click here for Large USDA Map
Degrees Celsius / Fahrenheit
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1
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Below -50 F
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Below -45.6 C
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Fairbanks, Alaska; Resolute, Northwest Territories (Canada) |
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2a
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-50 to -45 F
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-42.8 to -45.5 C
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Prudhoe Bay, Alaska; Flin Flon, Manitoba (Canada) |
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2b
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-45 to -40 F
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-40.0 to -42.7 C
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Unalakleet, Alaska; Pinecreek, Minnesota |
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3a
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-40 to -35 F
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-37.3 to -39.9 C
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International Falls, Minnesota; St. Michael, Alaska |
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3b
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-35 to -30 F
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-34.5 to -37.2 C
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Tomahawk, Wisconsin; Sidney, Montana |
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4a
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-30 to -25 F
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-31.7 to -34.4 C
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Minneapolis/St.Paul, Minnesota; Lewistown, Montana |
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4b
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-25 to -20 F
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-28.9 to -31.6 C
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Northwood, Iowa; Nebraska |
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5a
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-20 to -15 F
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-26.2 to -28.8 C
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Des Moines, Iowa; Illinois |
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5b
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-15 to -10 F
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-23.4 to -26.1 C
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Columbia, Missouri; Mansfield, Pennsylvania |
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6a
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-10 to -5 F
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-20.6 to -23.3 C
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St. Louis, Missouri; Lebanon, Pennsylvania |
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6b
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-5 to 0 F
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-17.8 to -20.5 C
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McMinnville, Tennessee; Branson, Missouri |
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7a
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0 to 5 F
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-15.0 to -17.7 C
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Oklahoma City, Oklahoma; South Boston, Virginia |
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7b
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5 to 10 F
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-12.3 to -14.9 C
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Little Rock, Arkansas; Griffin, Georgia |
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8a
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10 to 15 F
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-9.5 to -12.2 C
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Tifton, Georgia; Dallas, Texas |
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8b
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15 to 20 F
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-6.7 to -9.4 C
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Austin, Texas; Gainesville, Florida |
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9a
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20 to 25 F
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-3.9 to -6.6 C
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Houston, Texas; St. Augustine, Florida |
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9b
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25 to 30 F
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-1.2 to -3.8 C
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Brownsville, Texas; Fort Pierce, Florida |
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10a
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30 to 35 F
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1.6 to -1.1 C
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Naples, Florida; Victorville, California |
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10b
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35 to 40 F
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4.4 to 1.7 C
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Miami, Florida; Coral Gables, Florida |
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11
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above 40 F
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above 4.5 C
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Honolulu, Hawaii; Mazatlan, Mexico |
All horticultural material is classified according to its hardiness. Hardiness refers to a plant's ability to tolerate temperature. The USDA Plant Hardiness Zone map divides the United States into zones according to the average minimum cold temperature. A hibiscus brought to zone 5 from Southern Florida (zone 10) will not survive outdoors all year due to its hardiness.
This is air temperature and not wind chill temperature. Wind chill is based on human perception of temperature and doesn't affect plants. The wind associated with wind chill can be damaging however to woody ornamental plants (those that keep a woody portion above the ground year round). Determining what hardiness zone you live in is important when selecting plant material.
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