'Bump's Blue' Hemlock Dwarf Blue Mountain Hemlock HW5Fx2F
Botanical Reference: Tsuga mertensiana 
 
A slow-growing, narrow, "alpine-looking" conifer with bright blue needles. Discovered by Dr. Bump on the slopes of Mt. Hood in Oregon. Prefers sun/partial shade in well-drained soil. 5' tall x 2' wide in 10 years. Hardy to -20 degrees. USDA zone 5-7. Introduced by the Flora Wonder(tm) Collection of Buchholz Nursery.
 
American Conifer Society Details
Tsuga mertensiana 'Bump's Blue' / Bump's Blue Mountain hemlock
RECOMMENDED HARDINESS ZONES:5 (-10 to -20 F / -23.3 to -28.9 C)
HORTICULTURAL STATUS: EstablishedCOLOR: Blue TRINOMIAL TYPE: CultivarGROWTH SHAPE: Narrow Pyramid or ColumnarGROWTH SIZE: Dwarf: 1 to 6 inches (2.5 – 15 cm) per year / 1 to 5 feet (0.3 – 1.5 m) after 10 years
 
Tsuga mertensiana 'Bump's Blue' is an exceptionally narrow, irregular upright selection of Mountain hemlock with short, somewhat pendulous branches and bright powder-Blue, radiating needles, presenting an impressive Alpine look in the garden. After 10 years, a mature specimen will measure 5 feet (1.5 m) tall and 2 feet (60 cm) wide, an annual growth rate of 4 to 6 inches (10 - 15 cm).
 
This cultivar originated in the late 1950s, in the wild, on the slopes of Mt. Hood, Oregon. Dr. Forest Bump of Forest Grove, Oregon collected the plant and Buchholz nursery of Gaston, Oregon introduced it to the nursery trade as part of their signature, Flora Wonder™ collection.