Pignut hickory (Carya glabra) grows on well drained upland slopes in extreme southeast Iowa.
Hardiness: Zones 5 through 9
Growth Rate: Moderate
Mature Shape: Ovular crown
Height: 50-65 feet
Width: 30-40 feet
Site Requirements: Full to partial sun; tolerates clay, loam, slightly alkaline, acidic, occasionally wet, well-drained soil
Flowering Dates: April - May
Seed Dispersal Dates: September - December
Seed Bearing Age: 30 years
Seed Bearing Frequency: Every 1-2 years
Seed Stratification: Prechill for 4 months at 34°F to 40°F
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