Tsuga canadensis, Eastern Hemlock is a typically long-lived conifer generally confined to areas with highland climates, with cool and humid conditions. They can grow to heights of more than 100' and are tolerant of shade, moist soil, and slopes. Eastern hemlock can be a fast-grower, but is more often slow-growing. It must be placed where there is good drainage and no strong, drying winds. Trees seem somewhat pH adaptable but prefers acidity. They can be restrained as a hedge for years with regular pruning. Sunscorch will kill back branches and it will not tolerate drought. Attracts birds and butterflies, and is a larval host to the Columbia silkmoth. 
 
Declines in population from hemlock wooly adelgid infestation have led to Tsuga canadensis being listed as Near Threatened on the IUCN Red List.
 
Mainly found in the mountains and western Piedmont. Click to see its range in North Carolina
 
More info here