General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Plant Height: 24 inches
Plant Spread: 9 inches
Flowers: Showy
Fragrant
Flower Color: Blue
Pink
White
Bloom Size: 2"-3"
Flower Time: Summer
Late summer or early fall
Fall
Underground structures: Taproot
Uses: Cut Flower
Propagation: Seeds: Provide darkness
Days to germinate: 20-30 days
Sow in situ
Start indoors
Other info: transplant with care / taproot
Containers: Suitable in 3 gallon or larger

Image
Common names
  • Blue Lace Flower
  • Rottnest Island Daisy
Botanical names
  • Accepted: Trachymene coerulea subsp. coerulea
  • Synonym: Didiscus coeruleus
Also sold as:
  • Didiscus caeruleus

Photo Gallery
Location: RHS Harlow Carr kitchen garden
Date: 2018-07-22
Location: RHS Harlow Carr kitchen garden
Date: 2018-07-22
Location: all photos from my garden
Date: 2017-06-28
Location: RHS Harlow Carr kitchen garden
Date: 2018-08-05
Location: RHS Harlow Carr kitchen garden
Date: 2018-08-05
Fading bloom
Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2013-07-22
Location: RHS Harlow Carr kitchen garden
Date: 2018-08-05

Date: c. 1832
illustration from 'Journal et flore des jardins', 1830-32
Location: RHS Harlow Carr kitchen garden
Date: 2018-07-22

Courtesy Outsidepride
  • Uploaded by vic
Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2013-07-22
Spent bloom
Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2013-07-22
Location: Trade
Date: 2017-11-15

Date: 2010-07-01
Photo courtesy of: Yoko Nekonomania

Date: 2010-07-01
Photo courtesy of: Yoko Nekonomania
Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2013-06-28
Location: My Northeastern Indiana Gardens - Zone 5b
Date: 2013-06-28

 Photo Courtesy of Select Seeds. Used with permission.
  • Uploaded by Joy
Location: Kalama, Wa.
Date: 2001-10-10
  • Uploaded by Joy
Location: In my garden in Kalama, Wa.
Date: 2006-07-28
  • Uploaded by Joy

Photo Courtesy of Baker Creek Heirloom Seeds. Used with permissio
  • Uploaded by Joy

Photo Courtesy of Baker Creek Heirloom Seeds. Used with permissio
  • Uploaded by Joy
Comments:
  • Posted by chelle (N.E. Indiana - Zone 5b, and Florida - Zone 9b - Zone 9b) on Nov 7, 2013 7:29 AM concerning plant:
    I found this to be a particularly fussy plant in our hot and dry summer conditions. Out of approximately ten specimens transplanted into different areas of my gardens, only one survived to bloom stage. The lone survivor was planted in a light but moisture-retentive substrate made up primarily of composted horse manure, with its roots shaded by other plants.
  • Posted by gardengus (Indiana Zone 5b) on Oct 9, 2014 4:53 PM concerning plant:
    Considered a hardy annual in zones 7 through 10.
    Great cut flower.
Plant Events from our members
piksihk On February 9, 2018 Seeds sown
WG
MrsBinWY On April 9, 2018 Seeds germinated
4
MrsBinWY On March 25, 2018 Seeds sown
6x2 in 6-pack @ warm room temp; seeds from Lalambchop1 (from Chiltern for 2017, labeled Didiscus caeruleus 'Lace Mixture')
antsinmypants On June 11, 2023 Seeds sown
In pot by Stump Garden
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