Data specific to Daylilies (Edit)
AHS link: AHS Daylily Cultivar Info
Hybridizer: Adams-Adams
Year of Registration or Introduction: 1991
Foliage type: Dormant
Scape height: 34 inches
Bloom size: 5.5 inches
Bloom time: Midseason
Plant Traits: Diurnal
Fertility: Pod Fertile
Pollen Fertile
Bloom Traits: Self
Bloom Form: Single
Color description: clear yellow self with green throat

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: 3 child plants

Image
Common names
  • Daylily

Photo Gallery
Location: Saratoga, CA
Date: August 2005

Photo Courtesy of Strongs Daylilies. Used with Permission.
  • Uploaded by Joy
Comments:
  • Posted by Polymerous (South San Francisco Bay Area - Zone 9b) on Jul 9, 2013 11:26 PM concerning plant:
    Despite what the AHS database says, going by its hybridizing behavior, STARRY DAY is a diploid, not a tetraploid. This was determined many years ago by various members of the snail mail polytepal (as the term was back then) round robins. I personally have confirmed this for myself, by various crosses against known diploids. (I still have a polymerous seedling which I have kept for many years, whose parentage involved STARRY DAY, and also the diploids SPARKLING OPAL and FOUR STAR.)

    To compound and propagate the error, If you look at the three child plants listed for STARRY DAY, all of THOSE are also (imho) incorrectly registered as tetraploids. If you look at the other parents involved in the crosses - GIVE ME EIGHT, PURPLE PETALOID, FUCHSIA FOUR - those are all definitely diploid.

    STARRY DAY's hybridizing behavior has been known for many, many years. I am surprised that its designation as "tetraploid" still persists in the AHS database - and now is unfortunately being propagated in this database.

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