These are mostly big, shallow-rooted trees with an unusually graceful appearance. Horizontal to drooping branches bear needlelike leaves that are banded with white beneath, flattened and narrowed at the base to form distinct, short stalks. Small, oval brown cones hang down from branches. Deeply furrowed bark. Need some winter chill.
Do best with acid soil, summer humidity, and protection from hot sun and wind. Take well to heavy pruning; make excellent clipped hedges and screens. Easily damaged by salt and drought. In the Northwest, the hemlock woolly aphid can weaken these plants, especially those grown as hedges; it affects mainly T. heterophylla.Tsuga mertensiana
Native to high mountains, from Alaska south through higher Sierra Nevada in California and to northern Idaho and Montana. Grows to 50–90 ft. tall in the wild but is slow growing, smaller (20–30 ft. tall, half as wide) in gardens. Needles are 1/2–1 in. long, blue green with a silvery cast; they grow all around the stems to give branchlets a plump, tufty appearance. Trees at timberline frequently grow in a horizontal or twisted fashion. Thrives on cool slopes with highly organic soil. Least adapted to lowland, hot-summer areas. Needs partial shade in Zone 14. Somewhat resistant to hemlock woolly aphid. Good for large rock gardens, containers, and bonsai.
Native to the mountains of the western U.S. Can grow to 50–80 ft. tall and 20–25 ft. wide,...
Native to central and eastern North America. Grown mostly in cold-winter climates. Spreading, suckerin...
Native to high mountains, from Alaska south through higher Sierra Nevada in California and to northern...