North American Fruit Explorers mailing list at ibiblio

["edforest2010" <edforest55@hotmail.com>]

I finally found the Pomona issue and the article on sandwiching, it 
was written by Bernie Nikolai.
He said that it was in BC, Canada that a felllow, Percyy Wright, 
grafted some super hardy plums onto some peaches (so it wasn't in 
Alaska as I'd thought), then a test winter killed all the peaches that 
weren't grafted to the plums.
Percy thought that the plums caused the peaches to go dormant earlier 
in the fall. (I wonder why he didn't theorize that it caused them to 
leaf out later in the spring though, or at least why he ruled that 
out)
Bernie goes on to say that he used the above info to try what I 
believe he termed originally "sandwiching", or grafting a tender 
variety onto a hardy frame and later grafting the tender variety to a 
hardy branch tip, leaving the tender variety "sancwiched" between two 
hardy stocks. He suggests that this might give a tender variety an 
added protection against frost, beyond simply topworking.
So Bernie, have you had any success with this method?
The article was in issue XXV, Fall of '94, editor Bob Purvis.
Kevin B
PS, I myself have just begun to experiment with this, grafed a peach 
to a hardy plum frame, later to be grafted to plum again. I will try 
this with several peaches and plant them in different zones and see 
how far north peaches might grow. (Sadly, the plum/peach union is 
apparently not usually long lived, but peaches don't live that long 
anyway so, we'll see)


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