Common Blue Cohosh
Caulophyllum thalictroides
Found in rich forests. Weakley, Flora of the Southeastern United States (2025), South Central edition What its natural habitat tells you
Native to Alabama. How scores work Is it native here?
Profile 94%
- Height
- 1–2 feet
- Spread
- 6 inches–1 foot
- Light
- Dappled sunlight, Deep shade, Partial shade
- Soil moisture
- Usually moist
Space about 1 ft apart from its recorded spread, about 100 per 100 sq ft. Enter your bed size for a count
Will it fit your yard?No photograph yet. Looking for an old drawing…
At a glance
- Life cycle
- Perennial
- Leaves
- Deciduous
- Bloom
- April to May
- Fruiting season
- July to August
Recorded in 12 Alabama counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Forests on moist but not wet ground, such as rich slopes and ravines.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Alabama. Shared habitat, not food. 106 animals.
- Hermit ThrushCatharus guttatus
- Hooded MerganserLophodytes cucullatus
- Hooded WarblerWilsonia citrina
- Least FlycatcherEmpidonax minimus
- Louisiana WaterthrushSeiurus motacilla
- Mourning DoveZenaida macroura
- Northern CardinalCardinalis cardinalis
- Northern FlickerColaptes auratus
- Northern MockingbirdMimus polyglottos
- Northern ParulaParula americana
- Orange-crowned WarblerVermivora celata
- OspreyPandion haliaetus
- OvenbirdSeiurus aurocapilla
- Pileated WoodpeckerDryocopus pileatus
- Pine SiskinCarduelis pinus
- Purple FinchCarpodacus purpureus
- Red-bellied WoodpeckerMelanerpes carolinus
- Red-headed WoodpeckerMelanerpes erythrocephalus
- Red-shouldered HawkButeo lineatus
- Red-tailed HawkButeo jamaicensis
- Red-winged BlackbirdAgelaius phoeniceus
- Ruby-crowned KingletRegulus calendula
- Ruby-throated HummingbirdArchilochus colubris
- Ruffed GrouseBonasa umbellus
Who uses this plant?
1CaterpillarsGenus host records with ranges including AL
Genus host records with ranges including AL · Caulophyllum
- Crocigrapha normaniNorman's Quaker
0BeesSoutheastern regional records
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claimBeetles 2
- Idiostethus subcalvus
- Mordellistena biplagiata
Flower visits · Carlinville, Illinois, USA
Flies 7
- Chilosia petulca
- Chlorops assimilis
- Dynatosoma thoracicum
- Morellia micans
- Mydaea socialis
- Rhamphomyia piligeronis
- Rhingia nasica
Flower visits · Carlinville, Illinois, USA
Other wasps 3
- Bracon trifolii
- Bracon vernoniae
- Dacnusa flavicincta
Flower visits · Carlinville, Illinois, USA
No records yet · Ants · Adult butterflies / moths · Other insects
Plant details
- Family
- Berberidaceae
- Hardiness
- Zones 3a–8b
- Soil pH
- Acidic to alkaline
- Flower color
- Yellow or green
- Growth rate
- Moderate
- Growth habit
- Several stems
- Foliage color
- Green
- Fruit begins
- July
- Fruit ends
- August
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “April to May” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Yellow or green” · NC Extension Plant Toolbox (ranked first; USDA PLANTS differs)
- Foliage color · “Green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “July” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Fruit ends · “August” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (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–8b” · NC Extension Plant Toolbox
- Height · “1–2 feet” · NC Extension Plant Toolbox (ranked first; Tennessee Smart Yards, USDA PLANTS, Minnesota Wildflowers differ)
- Leaves · “Deciduous” · NC Extension Plant Toolbox
- Life cycle · “Perennial” · NC Extension Plant Toolbox
- Light · “Dappled sunlight (shade through upper canopy all day); Deep shade (less than 2 hours to no direct sunlight); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox
- Soil · “Moist” · NC Extension Plant Toolbox (ranked first; Tennessee Smart Yards differs)
- Soil pH · “Acidic to alkaline” · NC Extension Plant Toolbox
- Spread · “6 inches–1 foot” · NC Extension Plant Toolbox
Also known as
Blue Cohosh
Conservation status
| Alabama rank | SNR |
|---|---|
| Global rank | G4G5 [G5] |
| AL status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Growing cautions
- Spreads slowly. Spreads very slowly by rhizomes. Tennessee Smart Yards
For planning only; these do not change the score or Fit.
Sources
- Alabama Plant Atlas
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications