The ability of Canadian yew (Taxus canadensis) to tolerate the cold weather prevalent in the far northern areas of North America makes it a viable option for both shady and sunny spots. Canadian yew grows naturally from Canada through the Midwest. The shrub is between 3 and 6 feet high, with dark green needles. Canadian yew is not suitable for hot weather areas. The shrub is small enough to serve as ground cover.
In its natural form, English yew (Taxeus baccata) is a 30- to 50-foot high tree, but multiple cultivars of English yew are shrubs, suitable for planting in the shade. For example, the Amersfoort hybrid grows to 8 feet, working well in rock gardens and along foundations. English yew is not a cold-tolerant yew, with USDA zone 5 the coldest zone it survives in. English yew is an easy yew to nurture, as long as the site drains well.
Japanese yew (Taxus cuspidate) grows native in Japan, but also in China and Korea. Some of its forms remain small, including Aurescens, which, at 3 feet high, earns its keep with its yellow needles that eventually change to green. Nana is a Japanese yew shrub hybrid that attains 10 feet in height, making it useful as a privacy screen or hedge. Japanese yew has no problem developing in the shade. The shrub either grows from a single trunk or possesses many smaller stems.
One of the premiere shrubs for shady sites is a cross between English yew and Japanese yew known as Anglojap yew (Taxus x media). This yew, developed early in the 20th century in Massachusetts, grows to different sizes depending upon the cultivar, but many are shrubs. Hybrids such as Bean Pole grow to 8 feet high but just 8 inches wide, while Densiformis reaches 4 feet tall, but expands to be 8 feet wide. Anglojap yew withstands pollution common in urban locations, but requires protection from biting winter winds to avoid discoloration of its needles.