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Fw: [GWL] USDA Climate Map & Canada Gardens to Visit

  • To: <gardenchat@hort.net>
  • Subject: [CHAT] Fw: [GWL] USDA Climate Map & Canada Gardens to Visit
  • From: "Marge Talt" <mtalt@hort.net>
  • Date: Tue, 31 Aug 2004 02:48:39 -0400

This is the 2nd post...


> From: Jo Ellen Meyers Sharp <hoosiergardener@earthlink.net>
> To: Garden Writers -- GWL -- The Garden Writers Forum 
> Date: Monday, August 30, 2004 10:32 PM
This just in from the Weekly Nursery & Management newsletter e-mail

New Zone Map will be more accurate The revised version of the USDA 
Hardiness Zone map will have many improvements, use more data and be 
more accurate, said <mailto:tony@plantdel.com>Tony Avent, owner of 
Plant Delights Nursery in Raleigh, N.C., and a member of the map's 
advisory board. The new map will be issued in two phases. Phase 1 
will show average annual low temperatures by zone in 5-degree 
increments (a and b designations) and use weather data from the last 
30 years. The current map, issued in 1990, uses 12 years of data. The

new map will better reflect coastal and lake effects and urban heat 
islands, Avent said. Phase 2 will incorporate overlay maps to reflect

factors such as duration of cold, summer heat factors and possibly 
airflow patterns.

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