Northern Japanese Hemlock
Tsuga diversifolia
Pinaceae · coniferous tree · introduced
Last updated
Plant Profile
Size & Form
Height
80 ft
Site Requirements
Light
Full Sun to Shade
Hardiness
Zones 4–5
Ornamental Interest
Bloom Time
Non-flowering
Origin
Japan
Watch for this season
RustHigh
Uredinial Stage (Summer)
Wood DecayHigh
Wound Infection Window
Pine needle scaleHigh
Crawler Emergence
Armillaria Root RotModerate
Active Below-ground Growth
+ 2 more — see full disease and pest lists below
Diseases: Regionally Documented (11)
Phytophthora spp. (P Phytophthora Root Rot Heterobasidion occidentale Otrosina & Garbel Heterobasidion Root Disease Armillaria spp. — primarily A Armillaria Root Rot Drought Injury Arceuthobium spp. (parasitic plant) Dwarf Mistletoe Gray Mold Coniferiporia sulphurascens Laminated Root Rot Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Multiple pathogens cause shoot blight on different hosts:... Shoot Blight Rhizoctonia spp. (binucleate) Web Blight Multiple Basidiomycete fungi cause wood decay in trees Wood Decay
Pests: Regionally Documented (5)
Data Maturity Structured Multiple sources. Expert review underway.