Chinese Arborvitae
Thuja orientalis
Cupressaceae · coniferous tree · introduced
Last updated
Plant Profile
Size & Form
Height
15-20 ft
Spread
10-15 ft
Growth Rate
Slow
Site Requirements
Light
Full Sun
Soil Drainage
Well Drained
Soil pH
4.5-7.5 (strongly acidic to slightly alkaline)
Water
Moderate
Drought Tolerance
Moderate
Hardiness
Zones 6–10
Ornamental Interest
Bloom Time
Spring
Origin
China and Korea
Watch for this season
Scale insectHigh
Crawler Emergence
Twig BlightModerate
Canker Development and Twig Dieback
LeafminerModerate
Larval Mining
Root weevilModerate
Adult Emergence & Foliar Feeding
Diseases: Regionally Documented (13)
Black Flagging Symptom category — not a single disease Root Rot Seiridium cardinale Seiridium Canker Diaporthe vaccinii or Diplodia tip blight agents Tip Blight Fungal growth Coniophora Growth Didymascella thujina Leaf Blight (Keithia Blight) Postia sericiomollis Pencil Rot (Brown Pocket Rot) Fomitopsis officinalis, Porodaedalea pini, and other wood... Stem Decay Perreniporia subacida Yellow Root Rot Phytophthora lateralis Port Orford cedar root rot Hendersonia coniothyrium Berckmann's Blight Phomopsis spp., Kabatina spp., and Pestalotiopsis spp. Shoot Tip Dieback Multiple fungal species cause twig blight on different ho... Twig Blight
Pests: Regionally Documented (10)
Various (Coleoptera, Lepidoptera) Borer Argyresthia cupressella Cypress tip moth Otiorhynchus spp. Root weevil Coccoidea Scale insect Tetranychidae Spider mite Various (Buprestidae, Scolytinae) Flat Headed And Shothole Borers Carulaspis juniperi Juniper scale Juniper fall-webworm Various (Agromyzidae, Gracillariidae, Tenthredinidae) Leafminer Physokermes piceae Spruce bud scale
Data Maturity Structured Multiple sources. Expert review underway.