Donna you said something I did not understand. Can you please explain what
you mean by DMSO on peach buds to keep them from freezing.
Recently there was a letter about AGRO-K sprayed on peach buds to keep
buds from frost damage. I could not find a supply source in Northeast
Wisconsin so I E-mailed AGRO-K in Minneapolis Minnesota and yesterday I
received a packet that explains their products. There is not a supply in
this area, they explained if spayed 24 hours prior to a frost it is
possible to have about 5F degrees of protection. They will UPS the
material to you. There was not a good explanation of how and what spray
would be used for disease or bugs.
As far as hardy plums I thought there are some European plums that are
cold hardy to -40F. Perhaps some one further north could expound on
that. Ray Zone 4-5 On the shore of Lake Michigan.