Data specific to Daylilies (Edit)
AHS link: AHS Daylily Cultivar Info
Hybridizer: Joiner
Year of Registration or Introduction: 1973
Foliage type: Dormant
Scape height: 18 inches
Bloom size: 5 inches
Bloom time: Midseason
Plant Traits: Extended Bloom
Rebloom
Bloom Traits: Self
Bloom Form: Double
Color description: rose self with green yellow throat
AHS Awards: Honorable Mention: 1979

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Flowers: Showy
Propagation: Seeds: Will not come true from seed
Propagation: Other methods: Division
Ploidy: Diploid
Child plants: 16 child plants

Image
Common names
  • Daylily

'Louise Mercer' was a featured
Plant of the Day for April 10, 2022.
Photo Gallery
Location: Little garden of Big Dreams, Dayton KY
Location: Stoneham MA
Date: September 3, 2022
Location: Melvindale, Mi. 48122
Date: Mid season 2008
A very northern hardy double that is beautiful in a clump.
Location: Little garden of Big Dreams, Dayton KY
Date: 2019-07-02
Location: My garden in Ontario, Canada
Date: 2022-07-24
Location: Melvindale, Mi
Date: 7/13
Photo by Cookies4kids
Location: Waldoboro Maine
Date: 2021-07-19
Louise Mercer
Location: Kalama, Wa
Date: 2010-07-11
  • Uploaded by Joy

Photo Courtesy of Homestead Farms Nursery. Used with Permission.
  • Uploaded by Joy
Location: Little garden of Big Dreams, Dayton KY
Location: STRATFORD
Date: 2019-07-27

Date: 2005-03-13

Photo courtesy of Karen Newman, Delano Daylilies

Date: 2009-01-13
Photo Courtesy of Liliana Flower Farm Used With Permission
  • Uploaded by vic

Date: 2010-03-27
Courtesy of The Gardens of Sunshine Hollow Used with Permission
  • Uploaded by vic
Photo by Hemlady

Photo Courtesy of Crossview Gardens. Used with Permission.
  • Uploaded by Joy

Date: 2006-07-11
   Photo Courtesy of Manatawny Creek Farm Used With Permission
  • Uploaded by vic

Photo Courtesy of Cheryl's Daylilies. Used with Permission
  • Uploaded by Joy
Photo by Joy
  • Uploaded by Joy

Photo courtesy of Briscos' Best Blooms. Used with permission.
  • Uploaded by Joy

Courtesy of Quarles Daylilies Used with Permission
  • Uploaded by vic

Photo Courtesy of Daylilies by the Pond. Used with Permission.
  • Uploaded by Joy

Photo Courtesy of Daylilies by the Pond. Used with Permission.
  • Uploaded by Joy

Photo Courtesy of E and B Farm Used with Permission
  • Uploaded by vic
Location: My garden in Kalama, Wa. Zone 8
Date: 2012-07-19
  • Uploaded by Joy

Photo Courtesy of Nottawasaga Daylilies. Used with Permission.
  • Uploaded by Joy
Comments:
  • Posted by Zoia (Stoneham MA - Zone 6b) on Dec 2, 2021 10:23 PM concerning plant:
    Somewhat Rusty during the great infestation of 2021
Plant Events from our members
christine2 On May 5, 2017 Transplanted
Moved from Pool
christine2 On June 1, 2009 Obtained plant
3
Mlbdphillips On August 18, 2019 Obtained plant
Ohio Daylily Society
SkirtGardener On July 24, 2020 Obtained plant
carpathiangirl On May 16, 2023 Obtained plant
SMG
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