Northern Sheepkill Kalmia angustifolia
Other Common Name(s):
- Phonetic Spelling
- KAL-mee-ah an-gus-tih-FOH-lee-ah
- This plant has high severity poison characteristics.
- See below
- Description
-
Sheep laurel is an evergreen flowering shrub in the Ericaceae (heath) familythat is native to North America from Canada south to VA in a variety of locations including moist bogs or swamps, disturbed sites, roadsides, and dry pine forests. In the wild it is found on sites that are typically dry in the summer and damp or even flooded in the spring. The genus name Kalmia is after Peter Kalm an 18th century botanist.
It grows up to 3 feet tall and 6 feet wide with a tap root and a dense mat of interwoven rhizomes which allow it to form colonies. In cultivation, it prefers full sun in moist acidic soils. While it will survive it languishes in the shade. Avoid planting in windy sites. The plant can be pruned, but keep in mind that next year's blossoms will appear on old growth.
Showy saucer shaped bright pink flowers form in summer in clusters below the leaves. The plant is a larval host to butterflies and moths as well as provides forage and nesting sites for birds.
Use in naturalized areas, foundation plantings, or woodland settings. It works as an understory shrub and grows well in wet or boggy conditions in a landscape. It may be adaptable to southern states in mountainous areas. The var. carolina is native to coastal and mountains of NC.
Insects, Diseases, and Other Plant Problems: In fields, it can be problematic for grazing animals due to toxicity. High pH soils will cause chlorosis. It can outcompete other plants and become weedy in some disturbed. It is allelopathic to conifer seedlings.
- See this plant in the following landscape:
- Cultivars / Varieties:
- var. carolina
- Tags:
- Cultivars / Varieties:
- var. carolina
- Tags:
-
-
Attributes:
- Genus:
- Kalmia
- Species:
- angustifolia
- Family:
- Ericaceae
- Life Cycle:
- Woody
- Country Or Region Of Origin:
- Eastern Canada to Eastern U.S.A
- Distribution:
- CT, DC, DE, MA, MD, ME, MI, NH, NJ, NY, PA, RI, VA, VT, WV Canada: MB, NB, NS, PE
- Wildlife Value:
- Grouse and other birds forage the leaves, willow ptarmigans use the plant for nesting sites. Larval host plant to the Columbia silk moth, Northern blue butterfly (Lycaeides idas), and brown elfin butterfly.
- Dimensions:
- Height: 1 ft. 0 in. - 3 ft. 0 in.
- Width: 4 ft. 0 in. - 6 ft. 0 in.
-
-
Whole Plant Traits:
- Plant Type:
- Shrub
- Woody Plant Leaf Characteristics:
- Broadleaf Evergreen
- Habit/Form:
- Erect
- Rounded
- Spreading
- Growth Rate:
- Slow
- Maintenance:
- Low
- Texture:
- Medium
-
-
Cultural Conditions:
- Light:
- Full sun (6 or more hours of direct sunlight a day)
- Soil Texture:
- High Organic Matter
- Soil pH:
- Acid (<6.0)
- Neutral (6.0-8.0)
- Soil Drainage:
- Moist
- Occasional Flooding
- Occasionally Dry
- Occasionally Wet
- Available Space To Plant:
- 3 feet-6 feet
- NC Region:
- Coastal
- USDA Plant Hardiness Zone:
- 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
-
-
Fruit:
- Fruit Color:
- Brown/Copper
- Cream/Tan
- Display/Harvest Time:
- Fall
- Fruit Type:
- Capsule
- Fruit Description:
- Small dehiscent capsule with many seeds displays from September to October and can remain on the plant for many years.
-
-
Flowers:
- Flower Color:
- Pink
- Purple/Lavender
- Red/Burgundy
- Flower Inflorescence:
- Corymb
- Flower Value To Gardener:
- Showy
- Flower Bloom Time:
- Spring
- Summer
- Flower Shape:
- Bell
- Saucer
- Flower Petals:
- 4-5 petals/rays
- Flower Description:
- 3/8 inch rose-pink to purplish crimson saucer to bell-shaped flowers with 5 petals and 10 stamens. They appear under leaves encircling the stem on stalked clusters from April to July.
-
-
Leaves:
- Woody Plant Leaf Characteristics:
- Broadleaf Evergreen
- Leaf Color:
- Blue
- Green
- Leaf Feel:
- Glossy
- Leathery
- Deciduous Leaf Fall Color:
- Purple/Lavender
- Red/Burgundy
- Leaf Type:
- Simple
- Leaf Arrangement:
- Opposite
- Whorled
- Leaf Shape:
- Elliptical
- Leaf Margin:
- Entire
- Hairs Present:
- No
- Leaf Description:
- Oval blue-green leaves with paler undersides. Turn reddish-green to purple in fall
-
-
Bark:
- Bark Color:
- Light Brown
- Light Gray
-
-
Stem:
- Stem Color:
- Brown/Copper
- Stem Is Aromatic:
- No
- Stem Cross Section:
- Round
- Stem Surface:
- Smooth (glabrous)
- Stem Description:
- Smooth brown erect stems
-
-
Landscape:
- Landscape Theme:
- Butterfly Garden
- Pollinator Garden
- Attracts:
- Butterflies
- Pollinators
- Small Mammals
- Songbirds
- Resistance To Challenges:
- Wet Soil
- Problems:
- Allelopathic
- Poisonous to Humans
- Problem for Cats
- Problem for Dogs
- Problem for Horses
- Weedy
-
-
Poisonous to Humans:
- Poison Severity:
- High
- Poison Symptoms:
- May be fatal If eaten in large quantities. Salivation, watering of eyes and nose, slow pulse, nausea, vomiting, sweating, abdominal pain, headache, tingling of skin, lack of coordination, convulsions, and paralysis, diarrhea, weakness, cardiac failure.
- Poison Toxic Principle:
- Andromedotoxin, a resinoid; arbutin, a glycoside, Grayanotoxin
- Causes Contact Dermatitis:
- No
- Poison Part:
- Flowers
- Fruits
- Leaves
- Seeds
- Stems