Quercus glauca
TAXONOMY
FamilyFagaceae
GenusQuercus
Zone7
LEARN MORE
Plants of the World OnlineABOUT
Quercus glauca, commonly known as the ring-cupped oak or Japanese blue oak, is a species of oak native to eastern and southeastern Asia, including Japan, China, and the Himalayas. It is an evergreen tree that can grow up to 20 meters tall. The leaves are dark green and glossy, with a bluish underside. This oak is known for its hardiness and ability to thrive in a variety of conditions.
ALSO KNOWN AS
Blue Oak
Cyclobalanopsis amamiana
Cyclobalanopsis glauca
Cyclobalanopsis glauca f. latifolia
Cyclobalanopsis glauca var. elongata
Cyclobalanopsis glauca var. kuyuensis
Cyclobalanopsis glauca var. lacera
Cyclobalanopsis glauca var. latifolia
Cyclobalanopsis glauca var. linearifolia
Cyclobalanopsis glauca var. stricta
Cyclobalanopsis globosa
Cyclobalanopsis repandifolia
Cyclobalanopsis sasakii
Cyclobalanopsis vibrayana
Perytis glauca
Quercus acuta var. bambusifolia
Quercus amamiana
Quercus bambusifolia
Quercus blakei var. vaniotii
Quercus dentosa
Quercus glauca f. lacera
Quercus glauca subsp. euglauca
Quercus glauca var. amamiana
Quercus glauca var. caesia
Quercus glauca var. elongata
Quercus glauca var. kuyuensis
Quercus glauca var. lacera
Quercus glauca var. linearifolia
Quercus glauca var. micrococca
Quercus glauca var. podocupula
Quercus glauca var. stricta
Quercus glauca var. villosa
Quercus globosa
Quercus ichangensis
Quercus lacera
Quercus laxiflora
Quercus longipes
Quercus lotungensis
Quercus matasii
Quercus repandifolia
Quercus sasakii
Quercus tranninhensis
Quercus vaniotii
Quercus vibrayeana
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity60%
Dormancy3 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Quercus glauca requires bright, direct sunlight for optimal growth. It thrives in moderate temperatures and prefers a humid environment. Regular watering is necessary, but the soil should be allowed to dry out partially between waterings. This tree is relatively low-maintenance but benefits from occasional pruning to maintain its shape and health.Soil
Quercus glauca prefers well-draining loamy soil. It can tolerate a range of soil types but thrives best in soil that retains some moisture without becoming waterlogged. Good drainage is essential to prevent root rot.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is suitable for Quercus glauca. Fertilize in the spring and summer months to support growth. Avoid over-fertilizing, as this can lead to nutrient imbalances.Repotting
Repotting is generally not necessary for Quercus glauca when grown outdoors. However, if grown in a container, repot every 2-3 years to provide fresh soil and adequate space for root growth. Choose a container that is slightly larger than the current one and ensure it has good drainage.Propagation
Quercus glauca can be propagated from seeds or cuttings. Seeds should be collected in the fall and stratified before planting. Cuttings can be taken in late spring or early summer and rooted in a well-draining soil mix.Pruning
Pruning is beneficial for Quercus glauca to maintain its shape and remove any dead or diseased branches. Prune in late winter or early spring before new growth begins. Use clean, sharp tools to make clean cuts.Toxicity
Quercus glauca is not known to be toxic to pets or humans. However, as with all plants, it is best to prevent pets and children from ingesting any part of the plant.Additional
Quercus glauca is a versatile and hardy tree that can be used in a variety of landscape settings. It is particularly valued for its evergreen foliage and ability to provide year-round interest. Regular care and maintenance will ensure it remains healthy and attractive.REVOLUTIONIZE YOUR PLANT CARE
Make Every Plant Smart
Plant Monitor
STAYS IN YOUR PLANT
Accurately measures the core metrics of your plant – soil moisture, light, temperature and humidity - as well as compound metrics such as Vapor Pressure Deficit (VPD) and Growing Degree Days (GDD).
Shop Now
