Thuja occidentalis 'Nigra'
Overall Description
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.
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.
Fertilization / Feeding: Either
water soluble ( Miracle Gro, or equivalent ), or granular ( Holly Tone
is excellent ). Other granular types with 6-12-12, or 10-10-10 ratio is
acceptable. Best to fertilize in early spring, and again in mid fall -
avoid feeding during hot summer months, and directly after
transplanting.
