Sunflowers in a bed of annuals at the Chicago Botanic Garden(Lohr)
 

Helianthus annuus

Sunflower



 
  • Water use: Very low; grows in many parts of the west with no supplemental irrigation.
  • Light: Full sun.
  • Size: 2 to 12 feet tall and about 1/3 to 1/2 as wide.
  • Plant habit: Tall, upright, and coarse, branching out as it ages.
  • Season of bloom: Continuously from mid-summer until frost.  Flowers continue opening from the ends of the stems throughout the season.
  • Flowers: Plants produce bright yellow, pale yellow, orange, and burgundy flowers.  Some have a contrasting color ring in the center.  Doubles with many petals are available.
  • Culture: Plants are usually started from seeds sown outdoors in the place they are to be grown.
  • Maintenance: Plants produce viable seeds which will germinate the following year, but flower size and color may not be the same as what was originally planted.
  • Pests/Diseases: Insect- and disease-free.
Field of sunflowers in the south of France (Lohr)Sunflowers as cut flowers in a vase (Lohr)

  • Other:  This is the same plant that is grown for seeds, oil, and cut flowers.  The seeds can be collected and eaten.  Birds and squirrels will eat the seeds if they are left on the plant. Plants are native in Washington (or naturalized, with wild populations very near Washington). 

 
Additional photos


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Water-conserving plant list
Annuals
Page creators:
Virginia I. Lohr and Caroline H. Pearson-Mims
Dept. of Hort & LA, Washington St. Univ.
E-mail: pearson@wsu.edu
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Updated November 23, 2005