Thuja occidentalis 'Nigra'
A very hardy arborvitae with dark green foliage that retains its color through the winter. Excellent alternative to Emerald Green for use in privacy screens, tall borders, etc. Moderate to fast growth, and its insect & disease resistance make this plant very desirable. Slightly more cold hardy than many occidentalis varieties, it is becoming more and more popular throughout the north & northeast.
Pyramidal Arborvitae is known for it's superior foliage when mature,
and is a Thuja variety that should definitely be considered as an
alternative for Leyland Cypress, Thuja plicata ( Western Red Cedar )
varieties due to superior cold hardiness. Best way I can describe this
Thuja would be to say that it could in many ways be considered a
smaller, more compact version of the infamous Green Giant Arborvitae -
but with better cold hardiness, and darker green coloration.
Plant Facts & Specifications--Mature Height :
25 - 30 ft
--Mature Width :
6 - 8 ft.
--Growth Rate :
Moderate ( 8" - 14" avg per yr )
--Hardiness Zones :
4 - 8 ( if unsure of your zone, please use zone finder below )
--Sun Exposure :
Full sun to partial shade
--Soil Preference :
Average to slightly sandy, slightly acidic - well drained
--Foliage Color & Texture :
Good deep green color with heavy textured classic fanlike thuja foliage. Young seedlings can start out a bit sparse, but thicken up into a wonderfully dense tree. Like many Thuja cultivars, will shed some older undergrowth during the fall months.
--Flower, Cone, Or Berry Facts : Smaller 1/4" cones typical of Thuja occidentalis sp. are produced in heavy amounts on this particular variety. Cones start as a light pale green color, and ripen to a brown color as fall approaches. Cones generally contain several wingless seeds.
--Diseases / Insects :
Bagworms and spider mites are the most common problems seen with this variety. But seldom seen, and a regular inspection of plantings are recommended to check for any signs of issues.
--Recommended Spacing :
Approximately 6 ft apart for privacy screens or windbreaks.
--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 a good grade granular ( preferably organic ) fertilizer / plant food for use with all of our plant species. We personally use, and recommend the Espoma line of organic plant foods, as they are super effective yet gentle enough to use on even the most delicate of evergreen species where fertilizer burn would normally be a major concern. However, a water soluble type plant food (Miracle Gro, or equivalent ) are also acceptable options. Other granular fertilizers with a 6 - 12 - 12, or 10 - 10 - 10 ratio can also be used - but we suggest using them at 1/2 - 3/4 strength to avoid any chemical burn issues to the root system of the plants. Best to fertilize in early spring, and again in mid fall - avoid feeding standard chemical fertilizers during hot summer months, and directly after transplanting. The Espoma Organic Plant Foods may be used at anytime.