pollinaiton

Some tree fruits are self-fruitful (own pollen can fertilize the egg) and others require cross pollination (pollen from a different variety).  The requirements are shown in Table 2 (next page). If one cultivar is to provide pollen for another, their period of bloom should overlap, particularly early bloom.  Triploid apples such as Gravenstein, Winesap, Mutsu and Jonagold do not produce viable pollen, and cannot be used as a pollinizer.  Also, some cultivars have multiple strains such as Cortland and Redcort, or McIntosh and Redmax. Since these apples are almost identical genetically, they will not pollinate each other. Ornamental crabapples and pears are also viable pollen sources. Nursery catalogs often suggest pollinator matches for cultivars that have specific cross-pollination requirements.

For more information on cross-pollination see the University of Missouri fact sheet “Pollinating Fruit Crops” (http://extension.missouri.edu/explorepdf/agguides/hort/g06001.pdf) or consult a nursery catalog.

Crop

Cross-pollination

Apple

Require cross-pollination

Pear

Anjou and Bartlett are partially self fruitful.

Cross-pollination will improve cropping

Apricot

Most are self fruitful.  Perfection, Riland and Rival require cross pollination.

Peach, Nectarine

Most are self fruitful.  J.H. Hale is not.

Plums

Some prune types such as Stanley and Damson are self fruitful.  Most others either require or do better with cross-pollination.  European varieties require other European varieties as cross- pollinizers.  Likewise, Japanese plums need pollen from a different Japanese variety.

Tart cherry

Common varieties, such as Montmorency are self fruitful.

Sweet cherry

Stella and Lapins are self fruitful.

Bing, Lambert and Royal Ann require cross- pollination