Often thought of as the most beautiful of all the evergreens, it has a very lacy, graceful growth with short, soft light yellow-green needles in spring - changing to glossy dark green. Unlike most conifers, Canadian Hemlock tolerates shade well. Prefers moist, well drained soil with heavy organic content. Grows to 70 feet - spread of 35 feet, but can be pruned to maintain any height......and can even be sheared at much shorter heights for use as a nice, dense evergreen hedge. Likes sun, or shade but does not handle extreme wind or heavy drought well.
Plant Facts & Specifications
Mature Height: 50 - 70 ft
Mature Width: 15 - 25 ft
Growth rate: Moderate ( 4"-10" avg per yr )
Sun Exposure: Full sun to mostly shade - actually prefers a semi shaded spot.
Two physiological problems include sunscorch which occurs when
temperatures reach 95°F and above. The ends of the branches may be
killed back for several inches. Another problem is drought injury for
hemlocks are more sensitive to prolonged periods of dryness than most
other narrowleaf evergreens. Plants may die during extended dry
Soil Preference: Likes cool, moist, fertile soil with good acidity - well drained.
Foliage Color & Texture:
Evergreen - very light, fine textured needlelike foliage is nice green color year round. New growth is a lighter shade of green that darkens as it matures. No discoloration in winter.
Flower, Cone, Or Berry Facts: Cones
- small 1/2" - 1" light brown cones that are similar in shape to most pine / spruce cones.....but much smaller, and not nearly as thick & sturdy.
Diseases / Insects: Leaf blight, cankers, blister rust, needle rust, sapwood rot, hemlock borer, hemlock looper, spruce leaf miner, hemlock fiorinia scale, hemlock scale, spider mites, bagworm, fir flat headed borer, spruce budworm, gypsy moth, hemlock sawfly, and woolly adelgid. Despite all these problems mentioned, hemlocks under landscape conditions can prove to be very reliable, handsome ornamentals if given proper cultural care. The most significant liability to successful culture is the woolly adelgid and this singular pest has limited the use of hemlock in the northeastern quadrant of the United States.
Recommended Spacing: No specific spacing recommendations - will depend upon the purpose intended.
Deer Resistance Rating: Lowest Resistance [ 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 ] Highest Resistance
Fertilization / Feeding: For maximum health & hardiness, we highly recommend POOPeas
for use with all of evergreen species.
However, either water soluble ( Miracle Gro, or equivalent ), or
granular fertilizers ( Holly Tone is excellent ) are also good options. Most any granular fertilizers with a 6-12-12, or
10-10-10 ratio are also acceptable. Best to fertilize in early spring,
and again in mid fall - avoid feeding standard chemical fertilizers
during hot summer months, and directly after transplanting. POOPeas may be used at anytime.Additional Features & Characteristics:
Avoid Extreme Sun & Heat: Canadian Hemlock will suffer some branch dieback in some instances where exposure to strong mid day summer sun occurs simultaneously along with temperatures of 95 degrees or higher. Try to choose planting locations where this type of situation can be avoided if possible.
Excellent for Shady Locations: Canadian Hemlock has shown itself to thrive in areas with higher amounts of shade, and particularly does very well in areas with light, filtered sun.