I have had a kiwi vine for five years with plenty of flowers but never any fruit. I am suspicious that I may have been sold two plants of the same sex! When the buds have opened into flowers, is there any way to differentiate between the male and female flowers? I can't bear to turf it now.
The male and female flowers are distinctly different. http://www.cornhillnursery.com/retail/fruit/kiwiflowers.html The above link has pretty good images of both male and female flowers. You should be able to compare your plants and determine if you have both sexes.