Japanese Emperor Oak
Quercus dentata 'Pinnatifida'

Family: Fagaceae (fag-AY-see-ee) (Info)
Genus: Quercus (KWER-kus) (Info)
Species: dentata (den-TAY-tuh) (Info)
Cultivar: Pinnatifida

Category:

Trees

Height:

over 40 ft. (12 m)

Spacing:

20-30 ft. (6-9 m)

30-40 ft. (9-12 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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Pollen may cause allergic reaction

N/A

Bloom Color:

Pale Yellow

Cream/Tan

Bloom Time:

Mid Spring

Foliage:

Grown for foliage

Deciduous

Other details:

Average Water Needs; Water regularly; do not overwater

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)

Patent Information:

Non-patented

Propagation Methods:

By grafting

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

This plant has been said to grow in the following regions:

Shawnee Mission, Kansas

Clermont, Kentucky

Louisville, Kentucky

Port Orchard, Washington

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Apr 25, 2008, ViburnumValley from Scott County, KY (Zone 5b) wrote:

The cutleaf Japanese Emperor oak is certainly a plant for a collector of the plant kingdom's tree oddities. Fine in foliage but excessively slow in growth, this tree will befuddle most who gaze upon it.

The pictures I've contributed to this entry illustrate forty years of effort by one tree to survive in perfectly decent central KY growing conditions. Lack of photosynthetic surface makes a lot of difference in what dimensions a tree might achieve.

Buy it and grow it, but don't expect too much too fast.