There are new Kiwi on the market that are very hardy in our area (zone 5). They are smaller than the varieties found in your supermarket but sweeter. Mature vines can yield up to 25lbs of fruit per vine.
It is important to have the site well-drained. At the same time, your soil should be rich in organic material so that it holds moisture for proper growth. Kiwis need steady supply of moisture for best growth. When first planted make sure that your Kiwi receives regular watering. Without enough water young kiwis will die. Kiwis are heavy feeders so add as much compost and rotted manure to your soil as you can. Be sure never to use granular(like garden fertilizer) or green manure as this will definitely burn and kill the plants.
Avoid feeding after the first of August as they will produce soft growth which will not harden off for winter & will winterkill.
Pollination is important for fruit production. You will need at least one males for every nine females. Be sure your male & female are from the same species. Plant males as close to females, upwind if possible.
Young plants do not need to be pruned but as the plant matures you may wish to thin out the vines. This will limit the number of flower buds and your fruit will be larger than if left un-pruned.