However, the bloom periods of early and late blooming varieties may not overlap, resulting in poor pollination. Most flowering crabapples will pollinate nearby apple trees if they bloom at the same time. 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 European pears are self-unfruitful. Plant at least 2 different varieties for maximum fruit production. However, European and hybrid plums can be successfully grown in the state. European plums are partially to entirely self-fertile.