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Three-lobed Coneflower Rudbeckia triloba

Phonetic Spelling
rud-BEK-ee-a try-LO-buh
Description

Rudbeckia triloba, or Brown-Eyed Susan, is a herbaceous biennial or short-lived perennial that grows easily in average, moist, well-drained soils. It is a rugged plant, somewhat weedy, that tolerates heat, drought, deer predation, and a wide range of soils. It will also grow in light shade, although too much shade may cause it to need support. The plant's typical height is 3 to 5 feet with 2 to 4 inch leaves and 2 to 3 inch yellow flowers with dark purple-brown center disks. The leaves often have 3 lobes and a rosette of leaves that originate at the base of the stem persists through the winter, creating an attractive winter ground cover. Flowers bloom in late summer through fall and make an excellent cut flower. This plant differs from black-eyed Susan (R. hirta), which has a bloom of smaller, but more numerous, flowers.

Brown-Eyed Susan can be grown from seed started indoors in early spring or sown directly in the garden after last frost. If planting seedlings or plant sets, set them out after danger of frost has passed. You can deadhead spent flowers to encourage additional blooms, which also prevents any unwanted self-seeding. Because the plant self seeds, it can re-emerge in the spring garden regardless of the survival of the original plant through the winter.

Diseases, Insects, and Other Plant Problems:

No known insect or disease problems. Susceptible to powdery mildew. Watch for slugs and snails on young plants. May need support if grown in shaded site.

Going Native Profile 

Cut Flower Profile

See this plant in the following landscapes:
Round Garden Bed Vegetable Garden and Pollinator Plants Pollinator Garden- Full Sun
Cultivars / Varieties:
Tags:
#showy flowers#yellow#drought tolerant#perennial#wildlife plant#showy#cut flowers#winter interest#food source#cpp#NC native#summer flowers#deer resistant#herbaceous perennial#native garden#groundcover#pollinator plant#native wildflower#wildflower garden#larval host plant#food source fall#food source herbage#food source nectar#food source pollen#bird friendly#food source hard mast fruit#butterfly friendly#FACU Piedmont Mountains#FACU Coastal#pollinator garden#audubon#wavy-lined emerald butterfly#silvery checkerspot butterfly
 
Cultivars / Varieties:
Tags:
#showy flowers#yellow#drought tolerant#perennial#wildlife plant#showy#cut flowers#winter interest#food source#cpp#NC native#summer flowers#deer resistant#herbaceous perennial#native garden#groundcover#pollinator plant#native wildflower#wildflower garden#larval host plant#food source fall#food source herbage#food source nectar#food source pollen#bird friendly#food source hard mast fruit#butterfly friendly#FACU Piedmont Mountains#FACU Coastal#pollinator garden#audubon#wavy-lined emerald butterfly#silvery checkerspot butterfly
  • Attributes:
    Genus:
    Rudbeckia
    Species:
    triloba
    Family:
    Asteraceae
    Life Cycle:
    Biennial
    Perennial
    Recommended Propagation Strategy:
    Seed
    Country Or Region Of Origin:
    Central and Eastern United States
    Wildlife Value:
    Attracts bees, butterflies, and other pollinators with nectar and pollen in the blooms. This is a larval host plant for Silvery Checkerspot (Chlosyne nycteis) caterpillars which have one brood in the north and two broods from May-September in the rest of its range. This plant also supports Wavy-lined Emerald (Synchlora aerata) larvae. The adults feed on nectar from red clover, common milkweed, and dogbane. Songbirds, especially American Goldfinches, eat the seeds in the fall.
    Play Value:
    Wildlife Food Source
    Particularly Resistant To (Insects/Diseases/Other Problems):
    Moderately deer resistant. Drought tolerant.
    Dimensions:
    Height: 3 ft. 0 in. - 5 ft. 0 in.
    Width: 1 ft. 0 in. - 1 ft. 6 in.
  • Whole Plant Traits:
    Plant Type:
    Ground Cover
    Herbaceous Perennial
    Native Plant
    Perennial
    Wildflower
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Clumping
    Erect
    Maintenance:
    Low
    Texture:
    Coarse
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    High Organic Matter
    Loam (Silt)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Dry
    Available Space To Plant:
    3 feet-6 feet
    NC Region:
    Mountains
    USDA Plant Hardiness Zone:
    4a, 4b, 5b, 5a, 6a, 6b, 7a, 7b, 8b, 8a
  • Fruit:
    Display/Harvest Time:
    Fall
    Fruit Description:
    Displays from August to November
  • Flowers:
    Flower Color:
    Black
    Brown/Copper
    Gold/Yellow
    Flower Value To Gardener:
    Good Cut
    Long-lasting
    Showy
    Flower Bloom Time:
    Fall
    Summer
    Flower Petals:
    7 - 20 petals/rays
    Flower Size:
    1-3 inches
    Flower Description:
    Individual upper stems terminate in 1-2 flowerheads. Blooms late summer through fall, 2 to 3 inch, yellow flowers with a dark brown center. Blooms from July to October.
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Feel:
    Rough
    Leaf Arrangement:
    Alternate
    Leaf Shape:
    Lanceolate
    Ovate
    Leaf Margin:
    Dentate
    Entire
    Lobed
    Hairs Present:
    Yes
    Leaf Length:
    3-6 inches
    Leaf Width:
    1-3 inches
    Leaf Description:
    Leaves are 2 to 4 inches long and often have 3 lobes, deciduous.
  • Stem:
    Stem Color:
    Red/Burgundy
    Stem Is Aromatic:
    No
    Stem Surface:
    Hairy (pubescent)
    Stem Description:
    Densely branching.
  • Landscape:
    Landscape Location:
    Meadow
    Naturalized Area
    Landscape Theme:
    Butterfly Garden
    Cutting Garden
    Drought Tolerant Garden
    Native Garden
    Pollinator Garden
    Winter Garden
    Design Feature:
    Border
    Attracts:
    Butterflies
    Pollinators
    Small Mammals
    Songbirds
    Resistance To Challenges:
    Deer
    Drought
    Dry Soil