North American Fruit Explorers mailing list at ibiblio

[Scott Smith <scott@cs.jhu.edu>]

To add to the discussion here, I have not yet had any problem with my  
hybrid plums getting pollinated and I have no wild plums.  Superior I  
had grafted the previous spring and it produced an abundance of fruits  
only one year later.  I am in Maryland.  Maybe Alan is on to something  
with cold climates having more difficulty.  I have had more problems  
with the more pure salicina varieties such as Satsuma, and even  
greater problem with pluots which are very unreliable here.  Prunus  
simonii hybrids also do poorly for me, e.g. Wickson.  All of the  
varieties that do poorly for me do well in even more mild climates  
such as California.

Scott