Re: OT: USDA zones
- Subject: Re: [iris-talk] OT: USDA zones
- From: B*@aol.com
- Date: Tue, 1 Feb 2000 18:55:18 EST
From: BigAlligator@aol.com
In a message dated 2/1/00 6:26:19 PM Eastern Standard Time,
irises@senet.com.au writes:
<< However I've seen some of you useing an a, b etc suffix on your zone. Does
this subdivide the zones on the basis of rainfall or something else. >>
Colleen,
It subdivides the zones on the basis of temperature. In Zone 8, the
average lowest winter temperature is 10 F to 20 F. When broken down
further, Zone 8a will have average lowest winter temperatures from 10 F to 15
F, while those temperatures will be 15 F to 20 F in Zone 8b.
The Sunset Zones also combine rainfall and other factors into their
Zoning of the contiguous 48 US states and bordering Canada and Mexico, but I
know of no international equivilant of these ratings.
Mark A. Cook
BigAlligator@aol.com
Dunnellon, Florida.
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