Most grapes are self-fruitful, so cross pollination is seldom necessary. Brighton is an exception, and one of the few common varieties that is not self-pollinating, so it needs a partner to bear fruit. Nursery catalogs will usually state when a pollinator is needed for any cultivar.
Can you plant different grapes together?
All of the table and wine-type grapes are self-fruitful; but when you plant different grape varieties close together, they’re apt to cross-pollinate each other. Under certain environmental conditions, some seedless grapes may produce a few small, edible seeds or seed remnants.
Do you need 2 grape vines to produce grapes?
When you plant your grapes, make sure you are familiar with their mode of pollination. Most grapes are self-pollinating, which means you need at least 2 vines of the same variety to ensure they produce fruit.