Common pawpaw (Asimina triloba) can be found on the southeastern border and in the southwest corner of Iowa.
Habitat: Grows in thickets of wooded ravines, bottoms of bluffs and low areas of wooded streams.
Hardiness: Zones 5 though 8
Growth Rate: Moderate
Mature Shape: Small tropical looking tree; develops a narrowly pyramidal shape with dense, dropping foliage down to the ground. In the shade it grows tall, with more open branching, horizontally held leaves, and fewer low limbs.
Height: 15-20 feet
Width: 20 feet
Site Requirements: Deep fertile soil that is moist, but well-drained and slightly acidic (pH 5-7).
Flowering Dates: March - May
Seed Dispersal Dates: August - October
Seed Bearing Age: 5 years
Seed Bearing Frequency: Yearly
Seed Stratification: Prechill for 2 months at 40°F