Dig into Plants: Black-eyed Susan

Black-eyed Susan

Other Common Names: Common Black-eyed Susan, Brown-eyed Susan

Scientific Name: Rudbeckia hirta

Native to Alabama: Yes


 
Monarch Butterfly
Lady Bird Johnson Wildflower Center
Ray Mathews

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Learn more about...
 
Basic Information
Classification Button
Maintenance
Adaptations Button
Plant ID
Life Cycle
 


 
Basic Plant Information
Lady Bird Johnson Wildflower Center
Sally and Andy Wasowski

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  • I am a vascular plant with no woody stems above ground, so I am herbaceous.
  • I do not keep leaves year-round, so I am deciduous.
  • I come in many varieties and respond differently to various climates. 
  • In mild climates,I die back in winter but regrow in spring for many seasons, so I am perennial
  • In colder climates, I complete my life cycle in one growing season, so I am annual.
  • In some varieties, I have a two-year life cycle, so I am biennial.
  • I can grow 2 - 3 feet high and 2 - 3 feet wide.
 























 

  
Ecological Benefits
 
This plant provides food for:
Butterflies Caterpillars Native Bees Other Pollinators Other Birds
  Gorgone Checkerspot      
         
Other Ecological Benefit(s):
 
White-tailed deer graze on basal leaves in winter, bobwhite quail and wild turkey eat seeds
         
         
Other Plants Found in Alabama with Similar Ecological Benefits:
 
Orange Coneflower
(Rudbeckia fulgida)
Green-headed Coneflower
(Rudbeckia laciniata)
Shiny Coneflower
(Rudbeckia natida)
           
Softhair Coneflower
(Rudbeckia mollis)
Browneyed Coneflower
(Rudbeckia triloba)
 
  


   
Maintenance Notes
  • Dormant in winter.
  • Flowers can be cut for an indoor vase.
  • Clip wilted blooms to promote blooming and to reduce self-seeding.
  • Begins flowering during the second year of growth.
  • When watering, hold hose to base of plant for a count of 5 seconds.  Water should reach all roots.
  • Avoid sprinkling water on the leaves.
  • Requires average amount of water.
Average watering: water two times per week during the summer and once per week during the rest of the year.
 

 

  
 
Habitat Requirements
 
This plant prefers:
Full Sun
(6+ hours of sun per day)
 
 
 Average Watering
Well-drained, Sandy, Loamy, Clay, Acidic,
or Moist Soil
 
 

 

   


  
Leaf, Flower & Seed Identification
 
LEAF DESCRIPTION
black eyed susan leaf
USDA Plants Database
Patrick J Alexande
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Leaf Characteristics Chart (PDF)
       
Shape:
Ovate
Margin:
Serrate
Arrangement:
Alternate
Form:
Simple
   
Description:
Basal leaves (leaves at the base of the stem) have a stalk, are ovate, and are covered in bristly hairs; some leaves along the stem have stalks and others don’t, they are elliptical, serrate or entire, and hairy; up to 3” wide and 4” long

   
 
 
FLOWER DESCRIPTION
Lady Bird Johnson Wildflower Center
James L. Reveal
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Flower Shape Chart (JPG)
       
Color:
Yellow
Shape:
Radiate/Ligulate
Bloom Months:
Jun - Oct
 
Description:
2-3” wide flower occurs singly atop 1-2-foot long rough stems; disk florets (tubular, fertile floret that forms disk) form brown central cone; showy golden-yellow ray florets (narrow, petal-like, infertile floret that surround the disk) create daisy-like flower heads
 
 
 
SEED DESCRIPTION
USDA-NRCS PLANTS Database
Steve Hurst
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Type:
Fruit - Dry Seed Pod
Description:
Center disk becomes head of dry, dark brown-black, 4-sided, elliptical seeds lacking tufts of hair
Months in Seed:
Summer - Fall
 
Plant spreads by:
Seeds

   
 


 
Plant Life Cycle
Plant Life Cycle:
  • All plants start life as a seed.
  • The seed turns into a sprout when it grows roots.
  • The sprout becomes a seedling as grows a stem and leaves above the ground.
  • After the seedling becomes an adult plant it will grow flowers.
  General Plant Life Cycle - Dreamstime
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Plant Life Cycle continues:
  • After the flowers finish blooming, each flower turns into a seed.
  • When the seeds fall down to the ground, the plant life cycle starts again.
  • Each seed can become a plant if it has the food, water and space that it needs to grow.
  Minnesota Wildflowers
Katy Chayka

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ADDITIONAL RESOURCES FOR TEACHERS
 
Quick Fact Sheet
(Condensed Species Info)
Plant ID Sign:
Ready as-is PDF
Plant ID Sign:
Editable Word Doc
QR Code
(Links to this Webpage)



  


INFORMATION SOURCES FOR THIS PLANT
 
Lady Bird Johnson Wildflower Center Logo
 
USDA Natural Resources Conservation Service Logo
Alabama Plant Atlas Logo
 
Alabama Butterfly Atlas Logo
Missouri Botanical Gardens Logo 2019
 
   

 

 
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