Tsuga caroliniana

Carolina Hemlock

Pinaceae

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Habitat

  • native to the southern Appalachian Mountains
  • zone 5

Habit and Form

  • a needle evergreen tree
  • medium-sized, reaching 40' to 60' with a 20' to 25' spread
  • branches horizontal to slightly pendulous
  • a bit stiffer-looking than T. canadensis
  • overall pyramidal shape

Summer Foliage

  • leaves are 0.25" to 0.75" long and about 0.10" wide
  • leaves radially arranged on top of the branches and at the tips, but also 2-ranked in places
  • dark green above, with 2 white bands on the underside
  • shoots pubescent
  • needles are glossy and look "plastic-like"

Autumn Foliage

  • evergreen, no fall color

Flowers

  • monoecious, with male and female flowers
  • small and inconspicuous

Fruit

  • small cones, about 1" to 1.5" long
  • light brown color when mature
  • larger than T. canadensis cones with cone scales that recurve slightly and open widely

Bark

  • reddish brown
  • scaly and fissured

Culture

  • best growth on cool, moist, well-drained soils
  • transplant from containers or B&B
  • ovoid, dry, hot or windy sites
  • full sun or partially shaded locations are best
  • tolerant of pruning, but perhaps not as tolerant as T. canadensis
  • perhaps more pollution tolerant than T. canadensis

Landscape Use

  • lawn tree
  • specimen
  • screening; especially useful in shade locations
  • small grouping or groves

Liabilities

  • spider mites
  • deer like to browse the foliage or rub the bark with their antlers
  • not heat, wind, or drought tolerant
  • hemlock wooly adelgid is a new and devastating insect pest that can be easily controlled, but left unchecked can kill large plants in 3 years.
  • may be hard to locate for purchase

ID Features

  • pyramidal, medium-sized, needle evergreen tree
  • short flattened needles
  • twigs roughened by persistent leaf bases remaining after needles fall
  • numerous small, widely opened cones
  • separated from T. canadensis by the way the needles radiate from around the stem, the larger cones and the smooth leaf margins
  • rhizomatous growth
  • foliage in terminal whorls
  • diamond-shaped leaves with coarse serrations at the end of each leaf

Propagation

  • by seed
  • cultivars are grafted

Cultivars/Varieties

This plant is not common in the industry in any form, but specialty nurseries do list selected varieties occasionally.

'Arnold Pyramid' - This is a dense columnar form that grows to 40' tall.

'Compacta' - A shrub-like plant, this cultivar grows densely to form a mound that is wider than tall.

'Greenbrier' and 'La Bar's Weeping' (also listed as 'LaBar Weeping') - These are unusual weeping forms. The first selection forms a small tree much wider than tall with pendulous branches, while the latter cultivar naturally creeps along the ground. It must be staked upright if a small tree is desired to display the red-brown stems and deep green needles.

© Copyright Mark H. Brand, 1997-2015.

The digital materials (images and text) available from the UConn Plant Database are protected by copyright. Public use via the Internet for non-profit and educational purposes is permitted. Use of the materials for profit is prohibited.

Citation and Acknowledgements: University of Connecticut Plant Database, http://hort.uconn.edu/plants, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.