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Coastal Sweet-pepperbush

Clethra alnifolia

Found in pocosins, blackwater swamp forests, nonriverine swamp forests. FloraQuest, phone app (app page) What its natural habitat tells you

52
Strong

Native to Alabama. How scores work Is it native here?

Profile 100%

Height
5–10 feet
Spread
4–6 feet
Light
Full sun, Partial shade
Soil moisture
Somewhat dry to moist

Space about 5 ft apart from its recorded spread, about 4 per 100 sq ft. Enter your bed size for a count

Will it fit your yard?

At a glance

Life cycle
Woody perennial
Leaves
Deciduous
Bloom
June to August
Fruiting season
September to October

Recorded in 21 Alabama counties.

Natural habitats

Places it grows wild. Not a planting requirement.

Swamps

Loblolly bay in a coastal swamp
Regional / representative. Shown: Southern coastal swamps, Florida to Virginia; state not identified, a neighboring state.Loblolly bay in a coastal swamp, Marian Ellis Rowan, 1901. Public domain. Source record.

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Alabama. Shared habitat, not food. 130 animals.

All wildlife of Alabama

Ecological relationships

Who uses this plant?

What these records mean

9CaterpillarsGenus host records with ranges including AL

Genus host records with ranges including AL · Clethra

  • Coelodasys unicornisUnicorn Caterpillar Moth
  • Herpetogramma pertextalisBold-Feathered Grass Moth
  • Herpetogramma thestealisZigzag Herpetogramma, Subtle-Feathered Grass Moth
  • Lycia ypsilonWoolly Gray
  • Nola clethraeSweet Pepperbush Nola
  • Olethreutes inornatanaInornate Olethreutes
  • Prochoerodes lineolaLarge Maple Spanworm Moth
  • Pyrrharctia isabellaIsabella Tiger Moth, Banded Woolybear
  • Scopula limboundataLarge Lace-Border
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
11BeesSoutheastern regional records

Southeastern regional records · Clethra

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Clethraceae
Hardiness
Zones 3a–9b
Soil pH
Acidic to neutral
Flower color
Pink or white
Growth rate
Moderate
Growth habit
Several stems
Foliage color
Green
Fruit begins
September
Fruit ends
October

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
  • Bloom · “June to August” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
  • Flower color · “Pink or white” · NC Extension Plant Toolbox (ranked first; USDA PLANTS differs)
  • Foliage color · “Green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Fruit begins · “September” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
  • Fruit ends · “October” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
  • Growth habit · “Several stems” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Growth rate · “Moderate” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Hardiness · “Zones 3a–9b” · NC Extension Plant Toolbox
  • Height · “5–10 feet” · NC Extension Plant Toolbox (ranked first; USDA PLANTS differs)
  • Leaves · “Deciduous” · NC Extension Plant Toolbox
  • Life cycle · “Woody perennial” · NC Extension Plant Toolbox
  • Light · “Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox (ranked first; Virginia DCR Coastal Plain differs)
  • Soil · “Moist; Occasionally dry; Occasionally wet” · NC Extension Plant Toolbox (ranked first; Tennessee Smart Yards, Virginia DCR Coastal Plain differ)
  • Soil pH · “Acidic to neutral” · NC Extension Plant Toolbox
  • Spread · “4–6 feet” · NC Extension Plant Toolbox
Also known as

Coastal Pepperbush; Coastal Sweet pepperbush

Conservation status

Alabama rankS5
Global rankG5
AL statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

Will it fit your yard?

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How to check your spot

Growing cautions

For planning only; these do not change the score or Fit.

Sources