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ASIMINA TRILOBA - Pawpaw, Paw Paw, Papaw, Poor Man's Banana, Hoosier Banana |
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Native to North America and related to the custard apple. Cold hardy and grown as far north as New York and Michigan. This may give it promise as a rootstock for the Annonas. The fruit is edible, brown-black, with soft orange flesh tasting something like banana when ripe. The fruit must be thoroughly ripened or it is unpalatable.
Related species: Asimina incarna, A. longifolia, A. obovata, A. parviflora, A. pygmaea, A. reticulata, A. tetramera, A. X nashii. These eight Asimina species grow in the southeastern United States.
Distant Affinity: Cherimoya (Annona cherimola), Soursop (Annona muricata), Custard Apple (Annona reticulata), Sugar Apple, Sweetsop (Annona squamosa), Atemoya (Annona squamosa X A. cherimola).
Origin: The pawpaw is native to the temperate woodlands of the eastern U.S. The American Indian is credited with spreading the pawpaw across the eastern U.S. to eastern Kansas and Texas, and from the Great Lakes almost to the Gulf. Fossils prove the pawpaw is indigenous to the U.S.
Adaptation: The pawpaw is adapted to the humid continental climate of its native habitat. It is seldom found near the Atlantic or Gulf coasts. It requires a minimum of 400 hours of winter chill and at least 160 frost-free days. Pawpaws appear to be sensitive to low humidities, dry winds and cool maritime summers. It has been successfully grown in parts of California and the Pacific Northwest that meet its growing requirements. It has grown well in the San Jose area (USDA Climate Zone 9 or Sunset Climate Zone 15). The climatic conditions of Southern California make growing the pawpaw there more difficult. The deep winter dormancy of the tree makes it highly frost tolerant, withstanding temperatures of -25Εγ F or lower (hardy to USDA Climate Zone 5). Pawpaws can be grown as container specimens, although this is not often practiced. A deep pot is needed to accommodate the root system.
DESCRIPTION
Growth Habit: The pawpaw is a deciduous, often narrowly conical tree growing from about 12 feet to around 20 feet. Pawpaw trees are prone to producing root suckers a few feet from the trunk. When these are permitted to grow, the single-clone pawpaw patch comes into being. The prevailing experiences of many individuals is that the pawpaw is a slow grower, particularly when it is young. However, under optimal greenhouse conditions, including photo-period extension light of approximately 16 hours, top growth of up to 5 feet can be attained in three months.
Foliage: The dark green, obovate-oblong, drooping leaves grow up to 12 inches long, giving the pawpaw an interesting tropical appearance. The leaves turn yellow and begin to fall in mid-autumn and leaf out again in late spring after the tree has bloomed.
Fruit: The pawpaw is the largest edible fruit native to America. Individual fruits weigh 5 to 16 ounces and are 3 to 6 inches in length. The larger sizes will appear plump, similar to the mango. The fruit usually has 10 to 14 seeds in two rows. The brownish to blackish seeds are shaped like lima beans, with a length of 1/2 to 1-1/2 inches. Pawpaw fruits often occur as clusters of up to nine individual fruits. The ripe fruit is soft and thin skinned.
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