Tsuga diversifolia – Northern Japanese Hemlock (Japan)
Habit: Broadly conical large shrub or small tree, 5-8 (10) m tall, 3-4 m wide; crown domed; branches to the ground, loosely congested; slow growing, 20 cm a year.
Fruits: Small, cylindrical, ovoid cones, dark brown.
Leaves: Short, but variously long needles; late shoots from mid-May, light green, then shiny dark green on top with two broad, chalk-white bands beneath.
Roots: Shallow; sensitive to all kinds of invasion.
Demands: Sun or light shade to semi-shade, sensitive to warmth, likes cool to cold, humid areas, frost hardy; wind resistant.
Soil: Moderately dry to fresh; sensitive to heat and drought; on all acidic to neutral, well drained, humic substrates.
Recommended company: T. diversifolia is found in the sub-Alpine region of Japan next to numerous conifers such as Abies veitchii, Larix kaempferi, Picea jezoensis, and Pinus parviflora among others; in addition, it is accompanied by varieties of Japanese Acer, Ilex and Rhododendron and Azalea as well as Betula ermanii, Hamamelis japonica, Pieris japonica, Cornus canadensis and numerous dwarf bamboos, grasses and ferns.
Hardiness: Zone 6a