As mentioned above, you may need more than one tree (and more than one variety) for successful pollination. During your planning phase, make sure you have enough space for the number of trees needed, while keeping spacing requirements in mind between trees.

Title: Native Pollinator Plant Lists
Author/Source: Pollinator Pathways
Description: A list of lists tailored to Fairfield and Westchester counties -- choose lists of native plants, shrubs, and trees that are suitable for birds, bees, and butterflies both inland and on the coast. Includes two downloadable color-coded lists. 

Title: Fruit Tree Pollinators Charts & General Information
Author/Source: Amherst Nurseries
Description: Easy-to-use cross-pollination chart for different varieties of apples, pears, sweet cherries, and Japanese plums.

Title: Cross Pollinating Fruit Trees – Traditional Method
Author/Source: Edge of Nowhere Farm
Description: Short video discussing the traditional method of planting complementary varieties of fruit trees in order to promote pollination and fruit production. 

Title: Pollination of Pawpaw Trees
Author/Source: Peterson Pawpaws
Description: The native pawpaw tree is self-infertile, requiring some special attention to pollination; this page includes a video about pollination procedures.