Caucasian Wingnut
Pterocaryafraxinifolia

Family: Juglandaceae (joo-glan-DAY-see-ee)
Genus: Pterocarya (ter-oh-KAIR-ee-uh)
Species: fraxinifolia (fraks-in-ee-FOH-lee-uh)

Category
Trees

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun

Foliage
Deciduous

Foliage Color

Height
30-40 ft. (9-12 m)
over 40 ft. (12 m)

Spacing
over 40 ft. (12 m)

Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)

Where to Grow

Danger

Bloom Color
Pale Yellow
Pale Green

Bloom Characteristics

Bloom Size

Bloom Time
Late Spring/Early Summer

Other details

Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information
Non-patented

Propagation Methods
From softwood cuttings
From seed; direct sow outdoors in fall

Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry