• Photo of Andropogon ternarius (Andropogon ternariuss)

Plant Profile: Andropogon ternarius

Taxonomy: Andropogon ternarius

Names

Bluestem, Broomsedge, Broomstraw, Bunchgrass, Silver Bluestem, Splitbeard Bluestem, Split Bluestem

  • Photo of Andropogon ternarius (Andropogon ternariuss)

Phonetic Spelling:an-dro-POH-gon tern-AR-ee-us

Genus:Andropogon

Species:ternarius

Family:Poaceae

Splitbeard Bluestem is a warm-season perennial bunchgrass native to the Poaceae family, known for its ornamental qualities. It can reach heights of up to 3 feet and spread about 2 feet wide. This grass typically thrives in meadows, plains, and open woodlands, particularly in sandy soils. While it prefers full sunlight, it can also tolerate partial shade. Ideally, it grows best in well-drained sandy loam with low fertility.

During the summer, its foliage displays a striking silvery blue-green hue, which transforms into shades of copper, red, and bronze as fall approaches. From late summer to fall, the plant produces fluffy, silver seed heads that glisten in the sunlight. It adds aesthetic appeal to various landscapes, including meadows, cottage gardens, and woodland areas, especially when planted in large groups.

However, it is important to note that Splitbeard Bluestem has a high flammability rating. Therefore, it is advisable to avoid planting it within the defensible space around your home. Instead, consider selecting plants with lower flammability ratings for areas closest to your residence.

Andropogon ternarius Feature Summary

Andropogon ternarius Image Gallery

Tags

#fall color
#wildlife plant
#cover plant
#winter interest
#fall interest
#ornamental grass
#cottage garden
#dried flowers
#small mammals
#food source
#fire
#extreme flammability
#NC native
#broomstraw
#native garden
#shimmer
#native ornamental grass
#larval host plant
#food source winter
#food source fall
#food source herbage
#bird friendly
#food source hard mast fruit
#mammals
#butterfly friendly
#butterfly larvae
#Piedmont Mountains FACU
#Coastal FACU
#pollinator garden
#audubon
#meadows
#common wood-nymph butterfly
#various skipper butterflies

Similar Plants

Andropogon ternarius is often confused with:

Andropogon ternarius Feature Summary

Attributes
Adropogons were historically used for broom straw. Used for cattle grazing.
Central & E. U.S.A. to NE. Mexico
AL , AR , DC , DE , FL , GA , IL , IN , KS , KY , LA , MD , MO , MS , NC , NJ , OK , SC , TN , TX , VA
Members of the genus Andropogon supports Common Wood-Nymph (Cercyonis pegala) larvae which have one brood from late May to October. Adult Common Wood-Nymph butterflies feed on rotting fruit and flower nectar. This plant also supports various Skipper larvae. Provides excellent cover year-round. Seeds are eaten by songbirds and small mammals.
Perennial
Wind Shimmer
Wildlife Nesting
extreme flammability
Fruit
Seed heads are fluffy, silvery and shimmer in the wind from October to November.
Achene
Caryopsis
Gray/Silver
Flowers
The inflorescence has three to six pairs of racemes about 2 inches long with a white tuft of hair at the base. Flowers bloom from September to October.
White
Gray/Silver
Showy
Long-lasting
Good Dried
Leaves
The flat leaves are 8-18 inches long and very narrow at 2-4 mm wide. Both the leaves and sheaths are often densely hairy and have a waxy silver appearance. They develop a blue cast with age and turn copper or red in the fall.
Green
Gray/Silver
Blue
Brown/Copper
Red/Burgundy
> 6 inches
< 1 inch
Stem
The stems are long, slender, erect and often purplish to reddish-green with green upper sheaths.
Purple/Lavender
Green
Red/Burgundy
Hairy (pubescent)
Whole Plant Traits
Perennial
Native Plant
Ornamental Grasses and Sedges
Arching
Erect
Vase
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)
Acid (<6.0)
Neutral (6.0-8.0)
Good Drainage
Moist
Occasionally Dry
Coastal
Mountains
Piedmont
5b
5a
6a
6b
7a
7b
8b
8a
9a
9b
10a
10b
Loam (Silt)
Sand
Landscape
Butterfly Garden
Pollinator Garden
Children's Garden
Winter Garden
Cottage Garden
Native Garden
Fairy Garden
Border
Mass Planting
Accent
Specimen
Barrier
Meadow
Naturalized Area
Slope/Bank
Coastal
Near Septic
Butterflies
Pollinators
Songbirds
Small Mammals

Andropogon ternarius Attributes

Andropogon ternarius: Uses (Ethnobotany)

Adropogons were historically used for broom straw. Used for cattle grazing.

Andropogon ternarius: Country Or Region Of Origin

Central & E. U.S.A. to NE. Mexico

Andropogon ternarius: Distribution

AL , AR , DC , DE , FL , GA , IL , IN , KS , KY , LA , MD , MO , MS , NC , NJ , OK , SC , TN , TX , VA

Andropogon ternarius: Wildlife Value

Members of the genus Andropogon supports Common Wood-Nymph (Cercyonis pegala) larvae which have one brood from late May to October. Adult Common Wood-Nymph butterflies feed on rotting fruit and flower nectar. This plant also supports various Skipper larvae. Provides excellent cover year-round. Seeds are eaten by songbirds and small mammals.

Andropogon ternarius: Particularly Resistant To (Insects/Diseases/Other Problems)

Heat and drought tolerant.

Andropogon ternarius: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Andropogon ternarius: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Andropogon ternarius: 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

Andropogon ternarius: Fire Risk Rating

extreme flammability
high flammability
low flammability
medium flammability

Andropogon ternarius Fruit

Andropogon ternarius: Fruit Description

Seed heads are fluffy, silvery and shimmer in the wind from October to November.

Andropogon ternarius: Fruit Type

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

Andropogon ternarius: Fruit Color

grass
Gray/Silver

Andropogon ternarius: Display/Harvest Time

Fall
Spring
Summer
Winter

Andropogon ternarius Flowers

Andropogon ternarius: Flower Description

The inflorescence has three to six pairs of racemes about 2 inches long with a white tuft of hair at the base. Flowers bloom from September to October.

Andropogon ternarius: Flower Color

filter_vintage
Gray/Silver
filter_vintage
White

Andropogon ternarius: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Andropogon ternarius: Flower Value To Gardener

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

Andropogon ternarius: Flower Bloom Time

Winter
Spring
Summer
Fall

Andropogon ternarius Leaves

Andropogon ternarius: Leaf Description

The flat leaves are 8-18 inches long and very narrow at 2-4 mm wide. Both the leaves and sheaths are often densely hairy and have a waxy silver appearance. They develop a blue cast with age and turn copper or red in the fall.

Andropogon ternarius: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Andropogon ternarius: Leaf Color

spa
Blue
spa
Gray/Silver
spa
Green

Andropogon ternarius: Deciduous Leaf Fall Color

spa
Brown/Copper
spa
Red/Burgundy

Andropogon ternarius: Leaf Type

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

Andropogon ternarius: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Andropogon ternarius: 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

Andropogon ternarius: Leaf Margin

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

Andropogon ternarius: Hairs Present

No
Yes

Andropogon ternarius: Leaf Length

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

Andropogon ternarius: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Andropogon ternarius: Leaf Width

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

Andropogon ternarius Stem

Andropogon ternarius: Stem Description

The stems are long, slender, erect and often purplish to reddish-green with green upper sheaths.

Andropogon ternarius: Stem Color

grass
Green
grass
Purple/Lavender
grass
Red/Burgundy

Andropogon ternarius: Stem Is Aromatic

No
Yes

Andropogon ternarius: Stem Surface

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

Andropogon ternarius Whole Plant Traits

Andropogon ternarius: 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

Andropogon ternarius: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Andropogon ternarius: 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

Andropogon ternarius: Growth Rate

Slow
Medium
Rapid

Andropogon ternarius: Maintenance

Low
Medium
High

Andropogon ternarius: Texture

Fine
Medium
Coarse

Andropogon ternarius Cultural Conditions

Andropogon ternarius: 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)

Andropogon ternarius: Soil pH

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

Andropogon ternarius: Soil Drainage

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

Andropogon ternarius: Available Space To Plant

12 inches-3 feet
12-24 feet
24-60 feet
3 feet-6 feet
6-feet-12 feet
Less than 12 inches
more than 60 feet

Andropogon ternarius: NC Region

Coastal
Mountains
Piedmont

Andropogon ternarius: USDA Plant Hardiness Zone

thermostat
10a
thermostat
10b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Andropogon ternarius: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Andropogon ternarius Landscape

Andropogon ternarius: 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

Andropogon ternarius: 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

Andropogon ternarius: 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

Andropogon ternarius: 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

Andropogon ternarius: Attracts

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