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Swamp Loosestrife

Decodon verticillatus

Found in natural lakes, limesink ponds, peatlands, peaty swamps. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

49
Good

Native to West Virginia. How scores work Is it native here?

Profile 100%

Height
About 8 feet
Spread
6–8 feet
Light
Partial shade, Full shade, Full sun
Soil moisture
Wet to standing water

Space about 7 ft apart from its recorded spread. Enter your bed size for a count

Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Life cycle
Perennial
Leaves
Deciduous
Bloom
July to September
Fruiting season
Summer to fall

County records are not available.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

Swamps

Forested wetlands with standing water much of the year, such as cypress and gum swamps.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in West Virginia. Shared habitat, not food. 119 animals.

All wildlife of West Virginia

Ecological relationships

Who uses this plant?

What these records mean

5CaterpillarsGenus host records with ranges including WV

Genus host records with ranges including WV · Decodon

  • Acronicta oblinitaSmeared Dagger
  • Darapsa versicolorHydrangea Sphinx
  • Eudryas unioPearly Wood-Nymph
  • Hyalophora cecropiaCecropia Silkmoth, Cecropia Moth
  • Papaipema cataphractaBurdock Border, Potato-Stalk Borer
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
6BeesSoutheastern regional records

Southeastern regional records · Decodon

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
2BirdsRecorded genus food-resource interactions; not a state feeding claim

Recorded genus food-resource interactions; not a state feeding claim · Decodon

  • Agelaius phoeniceusRed-winged Blackbird
  • Gallinula galeataCommon Gallinule
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening

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

Growing and identification

Plant details

Family
Lythraceae
Hardiness
Zones 3–9
Flower color
Red
Growth rate
Rapid
Growth habit
Spreads to form colonies
Foliage color
Green
Fruit begins
Summer
Fruit ends
Fall
Growing sources and scope
Also known as

Water Oleander; Water Willow

Conservation status

West Virginia rankS1
Global rankG5
WV statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

Will it fit your yard?

Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.

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How to check your spot

Growing cautions

  • Forms colonies. USDA PLANTS lists its growth form as colonizing. USDA PLANTS

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

Sources