Graft or add new pollinizer trees. Most of the bramble fruits produced in Oklahoma are considered self-fruitful. The recommended varieties are self-fruitful. The Dallas variety of blackberries requires cross-pollination. Apricots are generally considered self-fruitful.
Sour cherries are self-fruitful.
Sweet cherries are self-unfruitful. Figs and Grapes Figs generally need cross-pollination. Grapes are mostly wind-pollinized. The exceptions are America, Enda, Last Rose and Brighton. They require cross-pollination by other varieties.