Trees that have been grafted to named cultivars are usually 2 years old at time of purchase, and they are more expensive than seedling trees. Since they retain the clonal identity of the parent, fruit quality is assured, given adequate cultural conditions. If possible, purchase container-grown trees. Field-dug trees may not perform as well, due to damage to the delicate root system. Caring for young trees Water newly planted trees immediately after planting, and as needed throughout the growing season.
Pawpaw trees require adequate soil moisture, especially in the first two years after planting.
Transplant shock may be reduced by providing temporary partial shade to newly planted trees. Thus the flower is designed not to be self-pollinated. In addition, pawpaw trees are self-incompatible, usually requiring pollen from a genetically different tree in order to be fertilized. Using a small, flexible artist's brush, transfer a quantity of fresh pollen from the anthers of the flower of one clone to the ripe stigma of the flower of another clone. The stigma is ripe when the tips of the pistils are green and glossy, and the anther ball is still hard and green.