Conifer Database - Nigra

Conifer Trees Database

Welcome to the American Conifer Society Database

Established in 1983, our mission is centered on advocating for the integration of conifer trees in garden designs and landscapes. We are dedicated to educating enthusiasts and the general public about the proper care, cultivation, and conservation of these majestic and diverse evergreens.

    
Thuja occidentalis ‘Nigra’

Thuja occidentalis 'Nigra' is a compact, conical selection of eastern arborvitae with exceptionally dark-green foliage that retains good green color in the winter in cold climates. After 10 years of growth, a mature specimen will measure 6 feet (2 m) tall and 3 feet (1 m) wide, an annual growth rate of 6 to 8 inches (15 - 20 cm).

This is an rather old cultivar in the nursery trade that unfortunately is of unknown origin. It is thought to have originated in the USA in the 1930s. L. H. Bailey formally described it in his 1933 book, Cultivated Conifers in North America.




Thuja occidentalis

Thuja occidentalis

RECOMMENDED HARDINESS ZONES


HORTICULTURAL STATUS:Established / Published
COLOR:Dark Green
GROWTH SHAPE:Narrow Pyramid or Columnar
GROWTH SIZE:Intermediate: 6 to 12 inches (15 – 30 cm) per year / 5 to 10 feet (1.5 – 3 m) after 10 years
ORIGIN:Unknown


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