Hello, George, So much of fruit gardening...as, indeed, is all other gardening, is done by guess and by golly. Luck plays as much a role as science, in my opinion. Weather conditions change, soil conditions change, insect population changes. And, through it all, one hopes to learn to roll with the punches and to learn as much what not to do as what to do:) Ron P.S. I do wish we had a transporter to beam some of the largesse to our friends:)