Every attempt must be made to assure fruit is produced. To allow for effective pollination, a minimum of 1 in 10 trees should be a compatible pollen source. An effective pollenizing cultivar is one that is a consistent bloomer every year, and has a large amount of viable pollen. It should bloom at the same time as the cultivar to be pollinated. The presence of 3 cultivars allows the pollen requirements of all 3 to be met even though one has nothing viable to contribute.
Some growers are interested in crabapple pollenizers.
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