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Periodic Post FAQ US Plant Hardiness-Zones Rev 01
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Subject: Periodic Post FAQ US Plant Hardiness-Zones Rev 01
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From: lionhert@ix.netcom.com (Richard & Marsha)
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Date: 4 Apr 1995 02:43:52 GMT
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Article: 62771 of rec.gardens
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Distribution: world
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Newsgroups: rec.gardens
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Organization: Netcom
FAQ: US PLANT HARDINESS-ZONE CHART:
Remember there are extremes in each of the zones
described below. In each Zone you can have
Dry-Normal-Wet moisture patterns, wind patterns,
and sun/shade patterns. It is entirely possible
for your garden to be in one zone and your neighbor's
garden in another. Likewise in severe weather years
your Zone may vary from the normal pattern.
Approximate range of Average
Annual MINIMUM Temperatures.
(Based on 10 deg.F increments)
C=Centigrade/ F=Farenheit
Zone 1 = below -45C/ -50F
Zone 2 = -45C/-40C -50F/-40F
Zone 3 = -40C/-34C -40F/-30F
Zone 4 = -34C/-29C -30F/-20F
Zone 5 = -29C/-23C -20F/-10F
Zone 6 = -23C/-18C -10F/ 0F
Zone 7 = -18C/-12C 0 F/+10F
Zone 8 = -12C/- 7C +10F/+20F
Zone 9 = - 7C/- 1C +20F/+30F
Zone 10 = - 1C/+ 4C +30F/+40F
Zone 11 = above+4C/ +40F
...............=======ooo=======.................
REVISED HARDINESS-ZONE CHART
Annual Average MINIMUM Terperature
(Based on 5 deg.F increments)
Zone 1 = below -45.6/c -50F
Zone 2a = -42.8/-45.5c -50/-45F
Zone 2b = -42.7/-40.0c -45/-40F
Zone 3a = -40.0/-37.3c -40/-35F
Zone 3b = -37.2/-34.5c -35/-30F
Zone 4a = -34.4/-31.7c -30/-25F
Zone 4b = -31.6/-28.9c -25/-20F
Zone 5a = -28.8/-26.2c -20/-15F
Zone 5b = -26.1/-23.4c -15/-10F
Zone 6a = -23.3/-20.6c -10/- 5F
Zone 6b = -20.5/-17.8c - 5/ 0F
Zone 7a = -17.7/-15.0c 0/+ 5F
Zone 7b = -15.0/-12.3c + 5/+10F
Zone 8a = -12.2/- 9.5c +10/+15F
Zone 8b = - 9.4/- 6.7c +15/+20F
Zone 9a = - 6.6/- 3.9c +20/+25F
Zone 9b = - 3.8/- 1.2c +25/+30F
Zone 10a = - 1.1/+ 1.6c +30/+35F
Zone 10b = + 1.7/+ 4.4c +35/+40F
Zone 11 = above+4.5c/ +40F
...............=======ooo=======.................
NOTE: The dates below are for the Northern Hemisphere
Zone 1 = Average dates Last Frost = 1 Jun / 30 Jun
Average dates First Frost= 1 Jul / 31 Jul
Note: vulnerable to frost 365 days per year.
Zone 2 = Average dates Last Frost = 1 May / 31 May
Average dates First Frost= 1 Aug / 31 Aug
Zone 3 = Average dates Last Frost = 1 May / 31 May
Average dates First Frost= 1 Sep / 30 Sep
Zone 4 = Average dates Last Frost = 1 May / 30 May
Average dates Frist Frost= 1 Sep / 30 Sep
Zone 5 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost= 30 Sep / 30 Oct
Zone 6 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost= 30 Sep / 30 Oct
Zone 7 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost= 30 Sep / 30 Oct
Zone 8 = Average dates Last Frost = 28 Feb / 30 Mar
Average dates First Frost= 30 Oct / 30 Nov
Zone 9 = Average dates Last Frost = 30 Jan / 28 Feb
Average dates First Frost= 30 Nov / 30 Dec
Zone 10 = Average dates Last Frost = 30 Jan or before
Average dates Last Frost = 30 Nov / 30 Dec
Zone 11 = Free of Frost throughout the year.
.............=======ooo=======..................
Frost: Light Freeze. damage depends upon
length of frost duration.
Light Freeze: -2C/-0C <> 29F/32F - tender plants
killed with little destructive
effect on other vegetation.
Moderate Freeze:-8C/-2C <> 25F/28F - wide destruction
on most vegetation with heavy
damage to fruit blossoms and
tender semi-hardy plants.
Severe Freeze: -9C <> 24F and colder, heavy damage
to most plants.
...............=======ooo=======...................
Shade: Usually an area under a closed tree canopy
that receives no direct sun at all.
Partial Usually an area under a lone or limited
Shade: number of trees receiving only a 1 to 5
hours of dappled sun during the day.
Partial Usually refers to an area that receives
Sun: approximately 3 - 5 hours of full
sun per day.
Full Sun: Refers to an area receiving 6 or more
hours of full sun per day.
...............========ooo========.................
Comments/Suggestions are welcome
lionhert@ix.netcom.com
The Internet = CyberKudzu
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