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Black-eyed Susan Rudbeckia

Other Common Name(s):

Other plants called Black-eyed Susan:

Phonetic Spelling
rud-BEK-ee-ah
Description

This is a Genus of about 31 species in the daisy family (Asteraceae) native to most areas of North America. They are commonly called coneflowers or black-eyed Susans. The genus name honors Olof Rudbeck, a 17th-century Swedish botanist. 

These plants can be annual, perennial or biennial, grow 2-10 feet tall and typically spread by self-seeding. They tolerate full sun to partial shade in dry to moist conditions and tolerate poorer soils. Deadheading can encourage further blooms.

The flowers have a raised central cone of disc flowers in black, brown and green surrounded by ray florets in yellow and orange colors. They typically have a long bloom season, are easy to grow and attract pollinators. They are deer and rabbit resistant.

Many species are used in prairie restoration, for ornamental use, and by livestock for forage. There are many cultivators available to use in the border of a pollinator/native garden, drought tolerant garden or cottage garden. They can also be used in naturalized areas.

Insects, Diseases, and Other Plant Problems:  No significant problems

Video by Andy Pulte for “Landscape Plant Identification, Taxonomy and Morphology” a plant identification course offered by the Department of Plant Sciences, University of Tennessee.

Additional Video - Part of the Native Plant Picks series from the North Carolina Sea Grant-led Coastal Landscapes Initiative

 

Profile Video:
See this plant in the following landscape:
Cultivars / Varieties:
Rudbeckia fulgida, Rudbeckia fulgida var. sullivantii 'Goldsturm', Rudbeckia hirta, Rudbeckia lacinata, Rudbeckia maxima, Rudbeckia speciosa, Rudbeckia subtomentosa, Rudbeckia triloba
Tags:
#drought tolerant#biennial#yellow flowers#native perennial#low maintenance#herbaceous perennial#native garden#naturalized area#native annual#poor soils tolerant#bee friendly#butterfly caterpillar host#full sun#partial shade#wildlife friendly#border#hs111
 
Cultivars / Varieties:
Rudbeckia fulgida, Rudbeckia fulgida var. sullivantii 'Goldsturm', Rudbeckia hirta, Rudbeckia lacinata, Rudbeckia maxima, Rudbeckia speciosa, Rudbeckia subtomentosa, Rudbeckia triloba
Tags:
#drought tolerant#biennial#yellow flowers#native perennial#low maintenance#herbaceous perennial#native garden#naturalized area#native annual#poor soils tolerant#bee friendly#butterfly caterpillar host#full sun#partial shade#wildlife friendly#border#hs111
  • Attributes:
    Genus:
    Rudbeckia
    Family:
    Asteraceae
    Life Cycle:
    Annual
    Biennial
    Perennial
    Wildlife Value:
    Host plants to caterpillars of some Lepidoptera species including cabbage moths and dot moths. Pollinators will visit the flowers
    Particularly Resistant To (Insects/Diseases/Other Problems):
    Deer and rabbit resistant
    Dimensions:
    Height: 2 ft. 0 in. - 10 ft. 0 in.
    Width: 1 ft. 0 in. - 3 ft. 0 in.
  • Whole Plant Traits:
    Habit/Form:
    Erect
    Spreading
    Growth Rate:
    Rapid
    Maintenance:
    Low
    Texture:
    Medium
  • 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
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Dry
    Available Space To Plant:
    12 inches-3 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b
  • Fruit:
    Fruit Color:
    Brown/Copper
    Fruit Type:
    Achene
    Fruit Description:
    Has many seeds
  • Flowers:
    Flower Color:
    Gold/Yellow
    Orange
    Flower Inflorescence:
    Head
    Flower Value To Gardener:
    Long Bloom Season
    Flower Bloom Time:
    Summer
    Flower Shape:
    Radial
    Flower Petals:
    7 - 20 petals/rays
    Flower Size:
    1-3 inches
    Flower Description:
    They typically have a raised central cone of disc flowers in black, brown and green shades that are surrounded by yellow or orange ray flowers. Will bloom most of the summer.
  • Leaves:
    Leaf Color:
    Green
    Leaf Type:
    Simple
    Leaf Arrangement:
    Whorled
    Leaf Margin:
    Entire
    Lobed
    Hairs Present:
    No
    Leaf Description:
    Green leaves are spirally arranged and ether have entire margins or are deeply lobed. Size and shape vary per species.
  • Stem:
    Stem Color:
    Green
    Stem Is Aromatic:
    No
    Stem Description:
    BGreen stems can be smooth or hairy
  • Landscape:
    Landscape Location:
    Naturalized Area
    Landscape Theme:
    Cottage Garden
    Drought Tolerant Garden
    Native Garden
    Pollinator Garden
    Design Feature:
    Border
    Small groups
    Attracts:
    Pollinators
    Resistance To Challenges:
    Deer
    Drought
    Poor Soil