LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old 17-01-2004, 09:42 PM
Jim Lewis
Posts: n/a
Default [IBC] Climate zones in general (was: New USDA map)

I'm afraid you have misunderstood the USDA standards for the
climate zones. The
climate zone records the AVERAGE winter low temperature. If the

temperature one year is -20 and the lowest temperature the next

year is zero,
you have an average minimum temperature of -10.

And, of course, there are quite a few more than 2 years from
which to work out the average, so it is fairly accurate.

We who live south of the Mason-Dixon line (USA), of course, wish
plant people would adopt the American Horticultural Society's
Heat Zone index. It is MUCH more important to us. I've seen it
used in a couple of (non-bonsai) books, but the nurseries have
yet to adopt it.

A good alternative would be the Sunset zones, which are based on
a number of factors. I do question, however, how valid those
zones are outside of the 10 western states that are Sunset's home

I was doing a Google for climate zones the other day and found
references to climate zone schemes in North America, Canada,
Europe, Great Britain, and Australia before I found what I was
looking for and quit the search. There MAY have been one for
Africa, too?????

Jim Lewis - - Tallahassee, FL - Nature
encourages no looseness, pardons no errors. Ralph Waldo Emerson

************************************************** ******************************
++++Sponsored, in part, by Mark Zimmerman++++
************************************************** ******************************
-- The IBC HOME PAGE & FAQ: --
+++++ Questions? Help? e-mail +++++

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
USDA zone map for UK - for comparison of climate, where to find? slugbug United Kingdom 33 12-01-2006 07:48 AM
[IBC] New USDA map 2 Jim Lewis Bonsai 16 21-01-2004 02:42 PM
[IBC] New USDA map Jim Lewis Bonsai 0 14-01-2004 06:42 PM
USDA zones (frost zones) Anne Middleton/Harold Walker United Kingdom 5 22-02-2003 06:20 PM
USDA map saki Roses 5 04-02-2003 05:08 AM

All times are GMT +1. The time now is 06:25 PM.

Powered by vBulletin® Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2004-2021
The comments are property of their posters.

About Us

"It's about Gardening"


Copyright © 2017