Daylily (Hemerocallis 'Yellow Mammoth') in the Daylilies Database

Data specific to Daylilies (Edit)
AHS link: AHS Daylily Cultivar Info
Hybridizer: Powell-L.K.
Year of Registration or Introduction: 1984
Foliage type: Dormant
Scape height: 36 inches
Bloom size: 10 inches
Bloom time: Midseason
Plant Traits: Rebloom
Bloom Form: Single
Color description: lemon yellow spider 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
Fragrant
Propagation: Seeds: Will not come true from seed
Propagation: Other methods: Division
Ploidy: Tetraploid
Parentage: Hudson Valley x Monster
Child plants: 2 child plants

Image

Photo gallery:
Location: IowaDate: 2017-07-17
By Legalily
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Photo courtesy of Karen Newman, Delano Daylilies
By Calif_Sue
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Location: My garden in Kalama, Wa. Zone 8Date: 2014-07-03
By Joy
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Location: Winston-Salem, NCDate: 2003-06-28
By Sscape
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Location: Haley Springs FarmDate: 2020-06-20
By Hembrain
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Photo Courtesy of Homestead Farms Nursery. Used with Permission.
By Joy
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Photo Courtesy of Mystic Meadows Daylily Farm. Used with Permissi
By Joy
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Photo Courtesy of Mystic Meadows Daylily Farm. Used with Permissi
By Joy
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Location: Winston-Salem, NCDate: 2004-07-06
By Sscape
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Discussion Threads about this plant
Thread Title Last Reply Replies
Will cutting away excess scape improve proliferations prior to removal? by Mikelos Aug 25, 2018 7:23 PM 21
July 2018 Blooms by Jillz Aug 11, 2018 5:23 PM 525
Your favorite must keep oldies! by bluegrassmom Sep 24, 2017 11:32 PM 39
July 2017 Blooms by cybersix Aug 5, 2017 2:26 PM 535
2017 Daylily Orders Recieved by spunky1 Nov 1, 2017 6:17 PM 339
What are YOU adding for 2017!!! by Nysbadmk8 Oct 13, 2017 9:27 AM 1,374
Early rust in the garden already by Seedfork Jul 15, 2016 9:00 AM 123
Wish List... if you could choose 3-5 new ones, what would you add? by bluegrassmom Oct 22, 2015 4:40 AM 160
Daylily Alphabet .... Show Us Your "Y's" by Hemlady Mar 4, 2020 4:31 PM 33
Strong Scapes by Seedfork Feb 18, 2015 10:13 AM 28
Daylilies with huge blooms by clintbrown Aug 2, 2014 9:49 AM 43
Your favorite older daylily? Ones you will always keep? by bluegrassmom Jan 1, 2013 6:02 AM 36
Your top 5 daylilies for 2012? by bluegrassmom Nov 29, 2012 12:56 PM 123
Which was the best daylilies in your garden for 2011? by bluegrassmom Feb 5, 2012 5:04 PM 127

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