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American Silverbells

Styrax americanus (STYE-racks a-mer-ih-KAY-na)

Family: Styracaceae Native Shrub (3-15 ft)

American snowbell is a native small tree or large shrub in the Styracaceae (silver bells) family. This slender branched woody ornamental is native to the southeastern US and can be found growing in swamps, marshy areas, stream banks, and other wet locations. Plant in full sun to partial shade in rich, acidic, well-drained sandy loam-based soils. It is tolerant of wet soils. When mature, it reaches a height and width of 6 to 10 feet with a wide, open crown and dense, uniform branches that originate from the base and up the main trunk. In the spring, pendulous, rounded clusters or single bell-like blooms of white flowers exude an aura of sweet fragrance that attracts pollinators like bees, butterflies, and moths. After flowering has completed, hairy fruits emerge. American silverbells do not sucker from the roots. This plant can be propagated by stem cuttings. To propagate by seed, once the seed has turned a glossy brown and the capsule has begun drying, collect the seeds. Seeds collected from the ground are not recommended for propagation. American snowbell requires a cold, moist stratification to break the seed dormancy. Place seeds in a bag of moist soil and refrigerate for 90 days, then sow the seeds in a warm greenhouse or cold frame. Alternatively, sow the seeds in pot outside and allow for natural winter stratification. Use this flowering small tree or shrub as a specimen in wet areas of the landscape in a woodland garden, or in small groups as a backdrop to a border or for screening. Planting it near a patio will ensure the enjoyment of the fragrant blooms. Host to Promethea silkmoth (Callosamia Promethea) Insects, Diseases, and Other Plant Problems: This plant does not do well when situated in tight conditions with other plants. It will do fairly well in full sun as long as adequate water is supplied.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 62 attributes.

How it fits the guild

Guild layer 3 - Shrub (3-15 ft) Optimal soil pH Acid (<6.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Native Plant; Shrub; Tree
Life cycle
Perennial; Woody
USDA zones
6a, 6b, 7a, 7b, 8a, 8b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Loam (Silt); Sand
Soil pH
Acid (<6.0)
Soil drainage
Good Drainage | Moist | Occasionally Wet
Available space
6-feet-12 feet
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 6 ft. 0 in. - 10 ft. 0 in. | Width: 6 ft. 0 in. - 10 ft. 0 in.
Growth rate
Slow
Maintenance
Medium
Canopy layer
3 - Shrub (3-15 ft)
Form & Appearance
Habit / form
Rounded
Texture
Fine
Foliage
Deciduous
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Elliptical; Ovate
Leaf margin
Serrate
Leaf feel
Glossy
Leaf size
1-3 inches long, 1-3 inches wide
Hairs present
Yes
Leaf detail
The bright green leaves are up to 3 inches long. May have a minimal amount of hair.
Fall color
Brown/Copper; Gold/Yellow; Insignificant
Flower color
White
Flower value
Fragrant; Showy
Flower shape
Bell
Flower size
< 1 inch
Flower detail
The bell-shaped flowers bloom either single or in clusters of 1-4. The flowers are white with 5 reflexed petals and have yellow stamens.
Bloom time
Spring; Summer
Fruit color
Brown/Copper; Gray/Silver
Fruit type
Capsule; Drupe
Fruit size
< 1 inch long
Fruit detail
A hairy subglobose (imperfect sphere) 1/3" long fruit follows flowering. At maturity, the fruits will be a gray-brown.
Bark color
Dark Gray
Bark detail
Thin, smooth and dark gray bark, but, fissures with age.
Wildlife & Ecology
Native status
Native
Origin
Southeastern U.S.A., NC
Distribution
AL, AR, DC, FL, GA, IL, IN, KY, LA, MO, MS, NC, OH, OK, SC, TN, TX, VA
Wildlife value
Host to Promethea silkmoth (Callosamia Promethea). Fragrant flowers and fruits attract pollinators, butterflies and birds.
Attracts
Bees; Butterflies; Moths; Pollinators
Play value
Attractive Flowers; Attracts Pollinators; Fragrance; Wildlife Food Source
Food & Medicine
Harvest time
Fall
Fruit type
Capsule; Drupe

Uses (ethnobotany)

Native ornamental

Landscape Use
Landscape location
Coastal; Meadow; Naturalized Area; Patio; Pond; Woodland
Landscape theme
Butterfly Garden; Native Garden; Pollinator Garden; Rain Garden
Design feature
Border; Screen/Privacy; Small groups
Garden tags
#native tree #native shrub #pollinator plant #NC native #fragrant flowers #Braham Arboretum #bird friendly #butterfly friendly #wet soils tolerant #bee friendly #flowering tree #deciduous shrub #slow growing #deciduous tree #small tree #border back #moth caterpillar host #playground plant #deciduous #wetland margins #moth friendly #larval host plant #patio #wildlife friendly #woodland #rain garden #screen #short lived #wetland
Problems & Resistance
Problems
Short-lived
Resistant to
Wet Soil
Propagation
Root Cutting; Seed; Stem Cutting

Planted at Hunnicutt

Nobody’s planted this one yet.