General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 12 - 48 inches
Plant Spread: 12 - 24 inches
Flowers: Showy
Flower Color: Yellow
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall

Image
Common names
  • Sundrops
  • Narrow-leaf Evening Primrose
  • Narrowleaf evening-primrose
  • Narrow-leaf evening-primrose
  • Shrubby Sundrops

Photo Gallery
Location: MacArthur lake on Fort Liberty reservation, North Carolina
Date: September 15, 2023
Narrowleaf sundrops #531; RAB page 752, 137-2-9; LHB page 739, 15
Location: Nora's Garden - Castlegar BC
Date: 2015-06-20
  - #Pollination - Blossom with a visiting friend.
Location: MacArthur lake on Fort Liberty reservation, North Carolina
Date: September 15, 2023
Narrowleaf sundrops #531; RAB page 752, 137-2-9; LHB page 739, 15
Location: My garden, Pequea, Pennsylvania 17565
Date: 2017-06-05
Location: Nora's Garden - Castlegar BC
Date: 2016-05-25
 5:53 pm. The base foliage often stays red, combining nicely with
Location: Nora's Garden - Castlegar BC
Date: 2016-06-09
 9:16 am. The red buds make a sharp contrast with the yellow blos
Location: My garden, Pequea, PA 17565
Date: 2016-06-10
Location: My Garden
Date: 2015-07-04
Location: Nora's Garden - Castlegar BC
Date: 2006-06-29 
 5:03 pm. A close-up of those rich yellow blossoms.
Location: Columbus, OH
Date: 6-3-2004
Location: Peterborough, ON, Canada
Date: 2013-06-22
Location: My garden, Pequea, Pennsylvania 17565
Date: 2017-06-13
Location: Ann Arbor, Michigan
Date: June 16, 2016 
Sundrops, Oenothera fruticosa

 Photo Courtesy of Select Seeds. Used with permission.
  • Uploaded by Joy
Location: Main Botanical Garden at the Academy of Sciences in Moscow
Date: June
credit: Andrey Korzun
Location: Main Botanical Garden at the Academy of Sciences in Moscow
Date: June
credit: Andrey Korzun
Location: Main Botanical Garden at the Academy of Sciences in Moscow
Date: June
credit: Andrey Korzun
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Comments:
  • Posted by sallyg (central Maryland - Zone 7b) on Jul 4, 2023 9:20 AM concerning plant:
    Described as native to eastern North America, I know it as a perennial shared among gardeners. It has bright yellow spring flowers on stems about 12-18 inches high. It will gradually spread from the roots, making new rosettes and then new flowering stems in following years. Not an agressive spreader. Hardy to my zone 7 garden in partial shade.
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