I have three mature 10 yr. kiwi vines. They are (dunbarton oaks, female), (cornell, male)and issai located in northern ohio. The vines produce lots of fruit but the male variety has never produced pollinating flowers. I can assume the self pollinating issai is pollinating the the female vine. My problem is this , both the female and issai vine produce lots of fruit but at the half grouth stage of the fruit they all drop off. The vines have done this since mature enough to produce fruit. What could be causing this fruit drop to occure year after year.
