Quercus glauca
Plant Expert:
Michael Dirr Quercus glauca
Michael Dirr
Quercus glauca
Quercus glauca (click for large image)
Blue Japanese Oak, Ring-cupped Oak 		Common Names:
  • Blue Japanese Oak
  • Ring-cupped Oak
More Images:
Blue Japanese Oak, Ring-cupped Oak Blue Japanese Oak, Ring-cupped Oak
Blue Japanese Oak, Ring-cupped Oak Blue Japanese Oak, Ring-cupped Oak
 
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Origin:

  Japan and China  

Sun/Water Requirements:

  Partial/Full sun.
Moderate to dry conditions.

Climate / Hardiness Zones:

  Zone 8 to Zone 9

Dirr says: "the 1983-94 winter (-3 degrees F in Athens, GA) devastated the species and fine old specimens were killed."

Growth:

  Range: Grows from 15' to 30'.
Dirr says: "the tree is shaped like a giant mushroom, probably 30' high and 40' wide with low-slung, wide-spreading branches."

Flowers:

  Color(s): Green
Season(s): Spring
 

Foliage:

  Broadleaf Evergreen
Color: Leaves are dark green in the summer.
Dirr says: "the emerging leaves may be injured by a late spring freeze."  

Fruit:

  Color: Black
Season(s): Late Summer
 

Landscape Value:

  Can be used as a specimen plant.
Can be used as a hedge plant.
Can be used as a grouping plant.

Dirr says: "handsome almost shrubby appearance in the landscape. The overall appearance is quite formal and the plant is best utilized in groupings. Makes an excellent large, screen plant and requires a minimum of maintenance."

Other:

  Is Resistant to Drought
Is Heat Tolerant
 

Other Quercus glauca References & Articles:
Quercus glauca is hardy in these areas:
Alameda, CAAlamo, CAAmador City, CA
American Canyon, CAAngwin, CAAntioch, CA
Atwater, CAAuburn, CAAugusta, GA
Bakersfield, CABronx, NYBrooklyn, NY
Brooks, CABrownsville, TXButte City, CA
Camptonville, CACanyondam, CACapay, CA
Carmichael, CACastro Valley, CACedar Ridge, CA
Challenge, CAChesapeake, VAChico, CA
Chowchilla, CAClovis, CACoarsegold, CA
Cutler, CADallas, TXDanville, CA
Del Rey, CADinuba, CADublin, CA
El Cerrito, CAEl Monte, CAEssex, CA
Fairfield, CAFawnskin, CAFlorence, SC
Fontana, CAForest Falls, CAFremont, CA
Hayward, CAHercules, CAHouston, TX
Jacksonville, FLKnightsen, CALafayette, CA
Las Cruces, NMLivermore, CALudlow, CA
Luling, LALutcher, LALydia, LA
Marrero, LAMartinez, CAMeraux, LA
Merced, CAMercedes, TXMesa, AZ
Mi Wuk village, CAMidpines, CAMission, TX
Moccasin, CAModesto, CAMoraga, CA
Moreno Valley, CAMount Airy, LANapa, CA
New Iberia, LANew Orleans, LANew Sarpy, LA
Newark, CANorco, LAOakley, CA
Oakville, CAOlmito, TXOrinda, CA
Penitas, TXPharr, TXPhelan, CA
Pinole, CAPinon Hills, CAPittsburg, CA
Playas, NMPleasanton, CAPope Valley, CA
Port Costa, CAPort Isabel, TXProgreso, TX
Rancho Cucamonga, CARedlands, CARialto, CA
Rimforest, CARiverside, CASan Antonio, TX
Santa Teresa, NMSaratoga, CASoquel, CA
South El monte, CA
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