The American hazelnut (Corylus americana) is found throughout Iowa except in the northwest corner.
Habitat: Commonly found in wood edges and dry open woods.
Hardiness: Zones 4 through 9
Growth Rate: Moderate to Rapid
Mature Shape: Rounded
Height: 15 to 18 feet
Width: 10 to 12 feet
Site Requirements: American hazelnut grows moist loamy to well drained sandy and clay soils. Adaptable to adverse soil conditions.
Flowering Dates: March - May
Seed Dispersal Dates: September - October
Seed Bearing Age: 3 years
Seed Bearing Frequency: Yearly
Seed Stratification: Seeds need 5 months cold stratification at 34°F to 40°F