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Re: USDA zones (was Re: location)

  When I first wrote suggesting that either the zone or a location be 
included on the messages, it was because one cannot intelligently respond 
in ignorance.  Even within zones, the heat factor must be considered.  
Zone 8 on the west coast does not have the same summer weather as zone 8 
in Texas.  Therefore, if one does not know his USDA zone, what's more 
important is to know the geographical location.

Barbara       zone 7/8       southwest of Fort Worth, Texas



> It is always good to know how the USDA (United States Department of
> Agriculture) determines its zones.  Fortunately, the zones are defined
> in a manner that can be applied anywhere in the world.  Your zone is
> determined by the coldest your location gets in the winter.
> 
>                   Fahrenheit       Centigrade/Celsius
>                   ----------       ------------------
>      zone 1        below -50°F          below -46°C
>      zone 2     -50°F to -40°F       -46°C to -40°C
>      zone 3     -40°F to -30°F       -40°C to -34°C
>      zone 4     -30°F to -20°F       -34°C to -29°C
>      zone 5     -20°F to -10°F       -29°C to -23°C
>      zone 6     -10°F to   0°F       -23°C to -18°C
>      zone 7       0°F to  10°F       -18°C to -12°C
>      zone 8      10°F to  20°F       -12°C to  -7°C
>      zone 9      20°F to  30°F        -7°C to  -1°C
>      zone 10        above 30°F           above -1°C
> 
> We tropics dwellers, feeling slighted, have claimed our own zone as
> well, although i haven't confirmed that the USDA recognizes our
> existence.  (Yes, there are parts of the US in the tropics.)
> 
>      zone 11  above 40°F? 32°F?      above 4°C? 0°C?
> 
> Someone has gone through the trouble of mapping out the zones in Europe:
> 
>      http://www.clubi.ie/emal/zones.html
> 
> All that said, it should be noted that the USDA zone system is not
> usually relevant to the square foot method.  It seems to be intended as
> a winter survival guide for perennials.  If you want to grow something
> such as kale or spinach through the dead of winter, then yes, it is
> important to know your USDA zone.  Otherwise, more specific clues about
> your climate would be more helpful.
> -- 
> @->-`-,----------------------------------------------+
> |  Cousin Ricky      USDA zone 11, Virgin Islands    |
> |  rcallwo@uvi.edu   formerly zone 6, Massachusetts  |
> +----------------------------------------------------+
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