• Photo of Allium cernuum (Allium cernuums)

Plant Profile: Allium cernuum

Taxonomy: Allium cernuum

Names

Nodding Onion

  • Photo of Allium cernuum (Allium cernuums)

Phonetic Spelling:AL-ee-um SAIR-new-um

Genus:Allium

Species:cernuum

Family:Amaryllidaceae

Nodding Onion is a perennial bulb native to the lily family, typically found in open woodlands near shale outcrops in low-elevation mountainous areas. Once established, it demonstrates drought resistance and is relatively easy to cultivate. The plant reaches heights of 1 to 2 feet, featuring long, grass-like leaves. From June to August, it produces nodding clusters of pink flowers that attract various pollinators. While it can propagate through both bulb offsets and seeds, the most effective method is by dividing the bulblets.

Historically, this plant was utilized in culinary applications, but it is now primarily appreciated for its floral display. It thrives in well-drained soil and prefers full sun to partial shade. Nodding Onion is versatile in its use, suitable for rock gardens, cottage gardens, mass plantings, or as part of borders. Additionally, it can naturally establish itself in meadows or open woodland areas.

Allium cernuum Feature Summary

Allium cernuum Image Gallery

Tags

#pink flowers
#mass planting
#NC native
#rock gardens
#borders
#edible
#food source fall
#cool season vegetable
#food source herbage
#food source nectar
#food source pollen
#native bulb
#food source bulbs
#bird friendly
#food source hard mast fruit
#FACU Piedmont Mountains
#FACU Coastal
#audubon

Similar Plants

Allium cernuum Feature Summary

Attributes
AL , AR , AZ , CO , DC , GA , IA , ID , IL , IN , KY , MD , MI , MN , MO , MS , MT , NC , NE , NJ , NM , NY , OH , OR , PA , SC , SD , TN , TX , UT , VA , WA , WI , WV , WY
Pollinators and songbirds are attracted to the plant.
The bulb is edible but is rarely used as better plants exist for this purpose.
Perennial
Bulb
Fruit
Spherical crested fruits that split open to expel shiny black seeds. Fruit displays from August to October.
< 1 inch
Flowers
Pink, lavender or white bell-shaped fragrant flowers bloom from June to August in 1.5 to 2-inch clusters. Individual flowers are 1/4 inch wide with 6 tepals and yellow stamens.
Pink
Purple/Lavender
White
6 petals/rays
< 1 inch
Leaves
Linear basal flat green leaves are up to 12 inches long and erect to arching. Margins are smooth, venation is parallel.
> 6 inches
< 1 inch
Stem
Light green to reddish-green smooth round stems
Green
Red/Burgundy
Smooth (glabrous)
Straight
Whole Plant Traits
Perennial
Native Plant
Bulb
Arching
Erect
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)
Alkaline (>8.0)
Neutral (6.0-8.0)
Good Drainage
Moist
Occasionally Dry
Less than 12 inches
Mountains
Piedmont
4a
4b
5a
6a
6b
7a
7b
8b
8a
High Organic Matter
Landscape
Butterfly Garden
Pollinator Garden
Cottage Garden
Native Garden
Border
Mass Planting
Small groups
Drought
Black Walnut
Poor Soil
Walkways
Woodland
Meadow
Naturalized Area
Small Space
Butterflies
Pollinators
Songbirds
Bees
Hummingbirds

Allium cernuum Attributes

Allium cernuum: Country Or Region Of Origin

North America

Allium cernuum: Distribution

AL , AR , AZ , CO , DC , GA , IA , ID , IL , IN , KY , MD , MI , MN , MO , MS , MT , NC , NE , NJ , NM , NY , OH , OR , PA , SC , SD , TN , TX , UT , VA , WA , WI , WV , WY

Allium cernuum: Wildlife Value

Pollinators and songbirds are attracted to the plant.

Allium cernuum: Edibility

The bulb is edible but is rarely used as better plants exist for this purpose.

Allium cernuum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Allium cernuum: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Allium cernuum Fruit

Allium cernuum: Fruit Description

Spherical crested fruits that split open to expel shiny black seeds. Fruit displays from August to October.

Allium cernuum: Fruit Type

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

Allium cernuum: Fruit Color

grass
Black

Allium cernuum: Display/Harvest Time

Fall
Spring
Summer
Winter

Allium cernuum: Fruit Length

< 1 inch
1-3 inches
> 3 inches

Allium cernuum: Fruit Width

< 1 inch
1-3 inches
> 3 inches

Allium cernuum Flowers

Allium cernuum: Flower Description

Pink, lavender or white bell-shaped fragrant flowers bloom from June to August in 1.5 to 2-inch clusters. Individual flowers are 1/4 inch wide with 6 tepals and yellow stamens.

Allium cernuum: Flower Color

filter_vintage
Pink
filter_vintage
Purple/Lavender
filter_vintage
White

Allium cernuum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Allium cernuum: Flower Value To Gardener

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

Allium cernuum: Flower Bloom Time

Winter
Spring
Summer
Fall

Allium cernuum: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Allium cernuum: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Allium cernuum: Flower Size

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

Allium cernuum Leaves

Allium cernuum: Leaf Description

Linear basal flat green leaves are up to 12 inches long and erect to arching. Margins are smooth, venation is parallel.

Allium cernuum: Leaf Color

spa
Green

Allium cernuum: Leaf Type

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

Allium cernuum: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Allium cernuum: 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

Allium cernuum: Leaf Margin

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

Allium cernuum: Hairs Present

No
Yes

Allium cernuum: Leaf Length

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

Allium cernuum: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Allium cernuum: Leaf Width

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

Allium cernuum Stem

Allium cernuum: Stem Description

Light green to reddish-green smooth round stems

Allium cernuum: Stem Color

grass
Green
grass
Red/Burgundy

Allium cernuum: Stem Is Aromatic

No
Yes

Allium cernuum: Stem Cross Section

Angular
Oval
Round
Square

Allium cernuum: Stem Surface

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

Allium cernuum: Stem Form

Straight
Zig Zags

Allium cernuum Whole Plant Traits

Allium cernuum: 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

Allium cernuum: 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

Allium cernuum: Growth Rate

Slow
Medium
Rapid

Allium cernuum: Maintenance

Low
Medium
High

Allium cernuum: Texture

Fine
Medium
Coarse

Allium cernuum Cultural Conditions

Allium cernuum: 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)

Allium cernuum: Soil pH

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

Allium cernuum: Soil Drainage

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

Allium cernuum: 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

Allium cernuum: NC Region

Coastal
Mountains
Piedmont

Allium cernuum: USDA Plant Hardiness Zone

thermostat
4a
thermostat
4b
thermostat
5a
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b

Allium cernuum: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Allium cernuum Landscape

Allium cernuum: 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

Allium cernuum: 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

Allium cernuum: 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

Allium cernuum: 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

Allium cernuum: Attracts

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