College of Agriculture, Health and Natural Resources

Plant Database

Kalmia angustifolia

Sheep Laurel, Lambkill Laurel

Ericaceae

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Habitat

  • native to Michigan down through Georgia
  • hardy in zone 1

Habit and Form

  • an evergreen shrub
  • 1' to 3' tall
  • wider than tall
  • spreading habit
  • medium texture
  • slow-growth rate

Summer Foliage

  • opposite to whorled leaf arrangement
  • simple, leaves
  • elliptic leaf shape
  • 1" to 2" long and not quite as wide
  • entire leaf margin
  • blue-green leaf color
  • poisonous

Autumn Foliage

  • evergreen; no fall color

Flowers

  • rose-pink flowers
  • 0.5" to 2" across
  • flowers borne in corymbs
  • bloom in late June

Fruit

  • non-ornamental, small dehiscent capsules
  • brown-tan color

Bark

  • rounded, brown stems
  • glabrous
  • trunks gnarled and twisted

Culture

  • partial shade to full sun
  • often touted as tolerant of heavy shade, but plants under those conditions are very thin and open and bloom sparsely
  • requires a cool, moist, acidic, organic soil for best performance
  • avoid windswept sites

Landscape Use

  • for evergreen foliage
  • naturalization
  • woods edge
  • flower effect
  • foundation plantings
  • excellent in partially shaded sites
  • works well with other broadleaf evergreens
  • for naturalizing

Liabilities

  • foliar burn in exposed sites
  • will languish in heavy, high pH soils
  • lacebug
  • leaf spot can be especially troublesome on non-resistant cultivars in moist, heavy shade
  • poisonous foliage

ID Features

  • broadleaf evergreen; elliptical leaves, acute apex
  • alternate leaves clustered at the shoot tip
  • fruit clusters upright
  • lateral buds hidden behind the petiole base
  • leaf margins entire (no serrations)
  • most often confused with Pieris sp.
  • very low growing shrub

Propagation

  • by seed
  • by cuttings

Cultivars/Varieties

'Candida' - This form is identical to the species, except it bears pure white blooms.

'Hammonasset' - A selection from Connecticut, this plant has a more spreading, stoloniferous habit and richer rose-colored blooms.

'Kennebago' - The leaves on this Maine selection are more lustrous, plus the flowers are a darker pink.

'Poke Logan' - Another plant originating in Maine, this cultivar has more glossy leaves and light pink blooms.

'Rosea' - The flowers on this selection are pinkish-red, while 'Rubra' has darker, more purple blooms.

© 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, https://plantdatabase.uconn.edu/, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.