Japanese Blue Oak
Quercus glauca
Fabaceae · broadleaf evergreen tree · introduced
Last updated
Data Coverage 2 of 6 dimensions
Quick Facts
Height
20–30 ft
Growth Rate
Slow
Light
Full Sun to Part Shade
Soil
Moist
Water
Moderate
Hardiness
Zone Zones 7a–8b
Bloom Time
April to May
Origin
extends from the Himalayas eastward to China, Japan and
Diseases (14)
Phytophthora ramorum Sudden Oak Death Arceuthobium spp. (parasitic plant) Mistletoe abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Armillaria ostoyae Armillaria Root Rot Colletotrichum acutatum complex (C Anthracnose Cytospora canker Cytospora Canker Microstroma album Frosty Mildew Ganoderma applanatum Ganoderma Root and Butt Rot Pseudoinonotus dryadeus Inonotus Root and Butt Rot Taphrina spp. Leaf Blister Phoradendron villosum Mistletoe (a True Mistletoe) Neonectria ditissima Nectria Canker Podosphaera aphanis var. aphanis Powdery Mildew Inonotus dryophilus White Pocket Rot (Piped Rot)
Pests (14)
Looper Stem Gall Asterolecanium spp. Pit scale Platycotis vittata Oak Treehoppers Bucculatrix albertiella Oak Ribbed Casemaker Phylloxera spp. Oak leaf phylloxera Various (Cynipidae, Cecidomyiidae, Eriophyidae, Psyllidae) Leaf galls Neuroterus saltatorius Jumping Oak Gall Andricus quercuscalifornicus California Gallfly Prionoxystus robiniae Carpenterworm Oak gall wasp Bucculatrix ainsliella Oak skeletonizer Edwardsiana rosae Rose leafhopper Various (Cynipidae, Cecidomyiidae, Eriophyidae) Leaf and twig gall