A few varieties, such as Jonathan and Golden Delicious, set a good crop without cross- pollination. Generally, however, plant at least two different varieties for maximum production. Few apricot varieties are reliably hardy in Iowa. Moongold and Sungold are hardy and self-unfruitful. Plant at least one of each for proper pollination.
Most varieties are self-unfruitful.
Most peach varieties are self-fruitful. Most pears are self-unfruitful. A few varieties, such as Kieffer, will set a fairly good crop without cross-pollination. However, for maximum fruit production plant at least two different varieties. However, some European and hybrid plums can be successfully grown in the state.