Daylily (Hemerocallis 'Cool Day') in the Daylilies Database

Data specific to Daylilies (Edit)
AHS link: AHS Daylily Cultivar Info
Hybridizer: Krekler
Year of Registration or Introduction: 1987
Foliage type: Semi-evergreen
Scape height: 21 inches
Bloom size: 5.25 inches
Bloom time: Late
Bloom Traits: Self
Color description: near white self with light green throat

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Flowers: Showy
Propagation: Seeds: Will not come true from seed
Propagation: Other methods: Division

Discussion Threads about this plant
Thread Title Last Reply Replies
Observations of Dormancy by admmad Nov 7, 2019 1:39 PM 27
Help with color description? by daylilly99 Nov 21, 2019 7:26 PM 23
Sick Daylilies - Coastal Texas - Zone 9 by adc1947 Oct 26, 2019 4:50 PM 6
Frank "Bud" Bennett intros by Bedmaker Oct 15, 2019 9:37 PM 17
Let's Discuss Rot by Seedfork Oct 27, 2019 9:57 PM 26
October 2019 blooms by profesora Oct 31, 2019 4:33 PM 256
How to Care for Proliferations? by lovegrillin Oct 1, 2019 3:10 PM 16
Weather In Your Garden ~ Fall 2019 by Char Nov 22, 2019 10:51 AM 724
OT ~ The Porch Swing ~ Fall 2019 by Char Nov 22, 2019 9:34 AM 967
Go south of the equator young daylily. by Gleni Nov 22, 2019 9:44 AM 342
I named a daylily after you. by kidfishing Oct 13, 2019 10:27 PM 43
Daylily seeds by MochaJoe Sep 16, 2019 8:11 AM 23
White Spots on My Daylilies - What is it??? by ljb5966 Sep 14, 2019 6:58 AM 21
Show us your PODS by petruske Oct 25, 2019 10:54 AM 45
September 2019 Daylily Blooms by Charlemagne Oct 4, 2019 7:15 AM 436
Seed Pod Degradation by Seedfork Sep 9, 2019 3:50 PM 27
My daylily order from Schrieners....... by Paul2032 Aug 18, 2019 10:39 AM 6
August Seedlings by kousa Sep 1, 2019 12:47 PM 207
August 2019 Daylily Blooms by Hazelcrestmikeb Sep 4, 2019 7:37 AM 489
Bad LA Seller Daylilyparadise by ediblelandscapingsc Aug 19, 2019 8:08 PM 77

« Add a new plant to the database

» Search the Daylilies Database: by characteristics or by cultivar name

« See the general plant entry for Daylilies (Hemerocallis)

« Visit the Daylilies forum

» Read our note about daylily rust scores

« The Daylilies Database Front Page

« The Plants Database Front Page

Today's site banner is by Marilyn and is called "Daylily"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.