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["Lon J. Rombough" <lonrom@hevanet.com>]

I can't speak for other places, but here in Oregon a good small scale remedy for grapes is a level teaspoon of laundry borax sprinkled around the vine at budbreak.  It's only needed every two to four years though.  Oddly, boron toxicity in grapes looks very much like boron deficiency.
-Lon Rombough
NEW grape pruning video: http://www.bunchgrapes.com/dvd.html
Grapes, writing, consulting, my book, The Grape Grower, at http://www.bunchgrapes.com  Winner of the Garden Writers Association "Best Talent in Writing" award for 2003. 
For all other things grape,   http://www.vitisearch.com
A video about The Grape Grower : http://cookingupastory.com/index.php/2008/04/18/the-grape-grower/
On Jan 9, 2009, at 9:44 AM, Jim Fruth wrote:

John McCuan asked, "How do supplement boron?  Do you just get borax at the 
hardware  store and sprinkle it on?  Is there some source that is designed 
specifically for agricultural use?"