Variation
var. jeffreyi
This lower altitude coniferous tree is similar to the species differing with sparse green foliage with fewer stomatic bands.

Cultivars
'Blue Star'
This small evergreen conifer grows to 1.5 m (5 ft) tall by 600 mm (2 ft) wide in 10 years with bright blue green needle-like leaves.  It is grown parks and gardens as a specimen preferring an open sunny to partially shade position and grows in well-drained moist soils that are tending acidic.  USDA zone 5

'Blue Dancer'
This slow-growing evergreen conifer attains a height of 2 m (6 ft) by 1 m (3 ft) wide in 10 years with blue green foliage on gracefully drooping branches, forming a pyramidal habit.  It prefers a well-drained moist soil that is tending acidic and is planted in parks and alpine gardens as a specimen. USDA zone 5

'Bonnie Blue'
This slow-growing coniferous shrub grows to 1.5 m (5 ft) tall by 1 m (3 ft) wide in 10 years with bright silvery blue foliage forming a broad compact pyramidal habit. It prefers a well-drained moist soil that is tending acidic and is planted in parks and alpine gardens as a specimen. USDA zone 5

'Elizabeth'
This dwarf shrub grows to a 1 m (3 ft) tall by 1.8 m (6 ft) wide in 10 years with blue-green needle-like foliage on horizontal branches forming a mounded habit. It is the only spreading hemlock and is commonly planted in small or alpine gardens as a specimen, preferring a well-drained moist soil and protection from hot dry conditions.  

'Glauca'
This slow-growing dwarf conifer attains a height of 3 m (10 ft) by 2 m (6 ft) wide with glaucous silvery grey needle-like foliage and forms a narrow conical habit.  It is planted in parks and gardens for colour contrast and is suitable for alpine regions preferring an open sunny position.  It grows in USDA zone 5.

'Mt Hood Blue', 'Bump's Blue'
This slow-growing conifer attains a height of 1.2 m (4 ft) by 600 mm (2 ft) wide with bright blue needle-like foliage on horizontal branches forming a narrow conical habit.  It is ideal for alpine gardens and is grown in parks as a specimen.  It prefers an open sunny position and grows on well-drained organic rich moist soils that are tending acidic. USDA zone 5