General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 8b
Plant Height: 60-90 cm
Plant Spread: 30 cm
Flowers: Showy
Flower Time: Summer
Late summer or early fall
Fall
Uses: Cut Flower
Wildlife Attractant: Bees
Resistances: Drought tolerant
Propagation: Seeds: Provide light
Self fertile
Stratify seeds: 4 weeks if sowing indoors
Days to germinate: erratic
Suitable for wintersowing
Sow in situ
Start indoors
Can handle transplanting
Other info: Seeds are short viable, best to sow direct after ripening
Pollinators: Beetles
Flies
Bees
Miscellaneous: Tolerates poor soil

Image
Common names
  • Sea Holly

Photo Gallery
Photo by sedumzz
Location: Riverview, Robson, B.C.   
Date: 2008-07-30
 - At dusk, this plant appears as a light blue haze or apparition
Location: Ann Arbor, Michigan
Date: June 2023
Location: Ann Arbor, Michigan
Date: 2022-07-16
Sea Holly. Proud to have nurtured these from winter sown seed.
Location: Hessenhof
Date: 2020-07-18
Photo by hedacc

Courtesy Outsidepride
  • Uploaded by vic
Location: all photos from my gardens
Date: 2019-05-19
Location: Twisp
Location: Hessenhof (Nursery)
Date: 2020-07-18

Courtesy Outsidepride
  • Uploaded by Joy
Location: Emigsville Pennsylvania (York county)
Date: 2015-08-20
#Pollination
Location: Hessenhof
Date: 2020-07-18
Location: Riverview, Robson, B.C.  
Date: 2008-07-18
Steel blue stems are striking and attractive. 7:47 pm.
Location: Twisp
Date: May
Location: Ann Arbor, Michigan
Date: 2023-05-13
May growing young plant, 3rd year
Location: My garden in Belgium
Date: 2009-08-01
Location: Twisp
Date: May
Location: Main Botanical Garden at the Academy of Sciences in Moscow
credit: Andrey Korzun
Location: My garden, Calgary, Alberta, Canada; zone 3.
Date: 2013-08-25
Location: Illinois, US
Date: 2011-07-10
Location: My garden in Belgium
Date: 2009-08-08
Location: My Garden
Date: 2013-07-23
Location: My garden, Calgary, Alberta, Canada; zone 3.
Date: 2014-06-15
This plant is tagged in:
Image Image Image Image Image

Comments:
  • Posted by Bonehead (Planet Earth - Zone 8b) on Oct 12, 2013 10:47 AM concerning plant:
    Dry flowers by cutting them just before the blooms have fully opened. Deadhead as a clump when most have turned brown. May re-seed. Very prickly, watch out!
Plant Events from our members
AtaMaj On February 28, 2020 Transplanted
plant all three tubers in the meadow, eastern inner acacia circle
AtaMaj On February 27, 2020 Obtained plant
dnrevel On June 22, 2023 Bloomed
Three plants with mature seed heads doing well. Mailbox garden.
dnrevel On July 18, 2022 Bloomed
Two plants now have lovely silvery blue seed heads in the mailbox garden. This is the second year of winter sown perennials grow from seed. Looking forward to how they overwinter and spread.
dnrevel On June 5, 2022 Transplanted
Transplanted from overwintered large pots (kept in plant teepee outdoors.) Transplanted 3 large plants and three smaller ones into full sun mailbox garden.
dnrevel On June 21, 2021 Potted up
Transplanted from WS container.
dnrevel On April 5, 2021 Seeds germinated
Sprouted in WS container.
dnrevel On January 2, 2021 Obtained plant
Winter Sowed on 1-2-2021. New seed from DnD Seed exchange. See notes for sowing.
» Post your own event for this plant

« Add a new plant to the database

« The Plants Database Front Page

Today's site banner is by Lucius93 and is called "Erysimum cheiri"

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