• Photo of Clethra acuminata (Clethra acuminatas)

Plant Profile: Clethra acuminata

Taxonomy: Clethra acuminata

Names

Cinnamonbark Clethra, Cinnamon Clethra, Mountain Pepperbush, Mountain Sweet-pepperbush

  • Photo of Clethra acuminata (Clethra acuminatas)

Phonetic Spelling:KLETH-rah ah-kew-min-AY-tah

Genus:Clethra

Species:acuminata

Family:Clethraceae

Mountain Pepperbush is a compact, deciduous tree or shrub indigenous to eastern North America, particularly thriving in the mountainous regions of North Carolina. It can reach heights of up to 20 feet when allowed to grow as a tree, or it can be trimmed to take on a more shrub-like appearance if preferred. Its lush green leaves, distinctive horizontal branching, and abundant flowers make it an excellent choice for smaller gardens. As it matures, the outer bark sheds, revealing a striking cinnamon hue. During the summer months, delicate white bell-shaped flowers bloom on drooping racemes, attracting various pollinators with their nectar. In the fall, the foliage turns a vibrant yellow.

In its natural environment, Mountain Pepperbush flourishes in moist, well-drained, humus-rich, and acidic rocky soils, although it can also adapt to drier conditions. It thrives in full sun to partial shade, with optimal blooming occurring in areas of partial sunlight.

Regarding potential issues, this plant is generally resilient but may occasionally experience problems such as fungal dieback and root rot.

Clethra acuminata Feature Summary

Clethra acuminata Image Gallery

Tags

#gold
#fragrant
#hummingbirds
#white
#deciduous
#fall color
#small tree
#fragrant flowers
#white flowers
#wildlife plant
#native tree
#native shrub
#food source
#NC native
#summer flowers
#deer resistant
#Braham Arboretum
#food source fall
#food source herbage
#food source nectar
#food source pollen
#fall color yellow
#bird friendly
#food source hard mast fruit
#butterfly friendly
#partial shade tolerant
#audubon

Similar Plants

Clethra acuminata Feature Summary

Attributes
Eastern United States, NC
NC, SC, GA, AL, TN, KY, VI, WV, PA
Hummingbirds and butterflies are attracted to the nectar of the blooms. Its seeds are eaten by birds.
Perennial
Wildlife Food Source
Fruit
Peppercorn-shaped seed capsules in racemes. Displays from September to October
Brown/Copper
Flowers
3-8 inch drooping racemes of white, bell-shaped flowers with extruded stamens are fragrant and open from the base to the tip. Blooms June- Aug.
< 1 inch
Leaves
3-6 inch long medium to dark green, alternate, and simple leaves. The base is narrowly cuneate to rounded and the apex is acuminate (pointed). Undersides are pubescent. The fall color is yellow-gold.
Elliptical
Ovate
3-6 inches
1-3 inches
Bark
Its bark may appear mottled as outer portions peel away to reveal a cinnamon color.
Dark Brown
Light Brown
Exfoliating
Peeling
Whole Plant Traits
Shrub
Tree
Native Plant
Rounded
Dense
Oval
Medium
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Deep shade (Less than 2 hours to no direct sunlight)
Acid (<6.0)
Good Drainage
Moist
Mountains
Piedmont
Clay
High Organic Matter
Loam (Silt)
Shallow Rocky
Landscape
Butterfly Garden
Pollinator Garden
Native Garden
Small Tree
Understory Tree
Butterflies
Songbirds
Hummingbirds

Clethra acuminata Attributes

Clethra acuminata: Country Or Region Of Origin

Eastern United States, NC

Clethra acuminata: Distribution

NC, SC, GA, AL, TN, KY, VI, WV, PA

Clethra acuminata: Wildlife Value

Hummingbirds and butterflies are attracted to the nectar of the blooms. Its seeds are eaten by birds.

Clethra acuminata: Particularly Resistant To (Insects/Diseases/Other Problems)

moderately resistant to deer damage

Clethra acuminata: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Clethra acuminata: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Clethra acuminata: Play Value

Attractive Flowers
Attracts Pollinators
Buffer
Colorful
Defines Paths
Easy to Grow
Edible fruit
Fragrance
Pieces Used in Games
Screening
Shade
Sound
Textural
Wildlife Cover/Habitat
Wildlife Food Source
Wildlife Larval Host
Wildlife Nesting
Wind Break
Wind Shimmer

Clethra acuminata Fruit

Clethra acuminata: Fruit Description

Peppercorn-shaped seed capsules in racemes. Displays from September to October

Clethra acuminata: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Clethra acuminata: Fruit Color

grass
Brown/Copper

Clethra acuminata: Fruit Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Clethra acuminata: Display/Harvest Time

Fall
Spring
Summer
Winter

Clethra acuminata Flowers

Clethra acuminata: Flower Description

3-8 inch drooping racemes of white, bell-shaped flowers with extruded stamens are fragrant and open from the base to the tip. Blooms June- Aug.

Clethra acuminata: Flower Color

filter_vintage
White

Clethra acuminata: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Clethra acuminata: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Clethra acuminata: Flower Bloom Time

Winter
Spring
Summer
Fall

Clethra acuminata: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Clethra acuminata: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Clethra acuminata Leaves

Clethra acuminata: Leaf Description

3-6 inch long medium to dark green, alternate, and simple leaves. The base is narrowly cuneate to rounded and the apex is acuminate (pointed). Undersides are pubescent. The fall color is yellow-gold.

Clethra acuminata: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Clethra acuminata: Leaf Color

spa
Green

Clethra acuminata: Deciduous Leaf Fall Color

spa
Gold/Yellow

Clethra acuminata: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Clethra acuminata: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Clethra acuminata: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Clethra acuminata: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Clethra acuminata: Hairs Present

No
Yes

Clethra acuminata: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Clethra acuminata: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Clethra acuminata Bark

Clethra acuminata: Bark Description

Its bark may appear mottled as outer portions peel away to reveal a cinnamon color.

Clethra acuminata: Bark Color

grass
Dark Brown
grass
Light Brown

Clethra acuminata: Surface/Attachment

Bumpy
Exfoliating
Fissured
Furrowed
Lenticels
Papery
Patchy
Peeling
Ridges
Scaly
Shaggy
Shiny
Shredding
Smooth
Spongy

Clethra acuminata Whole Plant Traits

Clethra acuminata: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Clethra acuminata: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Clethra acuminata: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Clethra acuminata: Growth Rate

Slow
Medium
Rapid

Clethra acuminata: Maintenance

Low
Medium
High

Clethra acuminata: Texture

Fine
Medium
Coarse

Clethra acuminata Cultural Conditions

Clethra acuminata: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Clethra acuminata: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Clethra acuminata: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Clethra acuminata: NC Region

Coastal
Mountains
Piedmont

Clethra acuminata: USDA Plant Hardiness Zone

thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b

Clethra acuminata: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Clethra acuminata Stem

Clethra acuminata: Stem Is Aromatic

No
Yes

Clethra acuminata: Stem Cross Section

Angular
Oval
Round
Square

Clethra acuminata: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Clethra acuminata Landscape

Clethra acuminata: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Clethra acuminata: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Clethra acuminata: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Clethra acuminata: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Clethra acuminata: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees