Data specific to Sempervivum (Edit)
Hybridizer: Named by Ronald S. Byles
History of species or Cultivar: See comment below.
Size: Small 1/2" to 2 1/2"
Medium 2 1/2" to 4"
Soil type: Dry
Well draining
Loamy / Medium
Sandy / light
Other: The soil type will depend on what your weather conditions are like. Just make sure it drains well.
Water: Very low
Average
Does not like wet feet
Uses: Accent
Containers
Pests and Diseases: Pest resistant

General Plant Information (Edit)
Plant Habit: Cactus/Succulent
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)
Leaves: Evergreen
Flowers: Showy
Flower Time: Summer
Late summer or early fall
Fall
Other: It may be several years before it blooms
Suitable Locations: Xeriscapic
Uses: Provides winter interest
Groundcover
Wildlife Attractant: Bees
Butterflies
Resistances: Deer Resistant
Propagation: Seeds: Provide light
Stratify seeds: Stratifying seeds may improve germination, but is not required
Suitable for wintersowing
Sow in situ
Will not come true from seed
Propagation: Other methods: Offsets
Containers: Suitable in 1 gallon
Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Monocarpic

Image
Common names
  • Hen and Chicks
  • Houseleek
  • Live-Forever
Also sold as:
  • calcareum 'Monstrosum'

Photo Gallery
Location: in our collection
Date: 2022-10-16
Location: Western Washington
Date: 2015-03-14

June 28, 2011, puchased from TImberline in Arvada, Co. in 2010.
Location: Western Washington
Date: 2023-05-14
Photo by snarfie
Location: Pacific Northwest, zone 8
Date: 2016-10-03
Location: Fairfax, Virginia (May 2022)
Date: 2022-05-16
Location: Washington
Date: 2016-05-26
Location: My garden, zone 4 Wisconsin
Date: 2012-07-01
zone 4 Wisconsin

Date: 2015-06-15
Location: Fairfax, VA | October 2022
Location: Willamette Valley, Oregon 
Date: 2015-07-23
Location: Fairfax, VA | November 2022
Date: 2022-11-06
Location: Western Washington
Date: 2020-06-17
Location: Pacific Northwest, zone 8
Date: Oct 2, 2012

Date: 2015-05-04

Date: 2015-05-04
Location: Germany, Bavaria
Date: 2015-07-15

6-9-11 Upper Midwest Zone 4
Location: South Jordan, Utah, United States
Date: 2019-11-14
Location: Denver, CO (full sun)
Date: 2011-04-16
New plant. Source:Timberline
Location: Fairfax, VA | September 2022
Date: 2022-09-11
Location: Fairfax, Virginia (May 2022)
Date: 2022-05-12
Location: Pacific Northwest, zone 8
Date: May 23, 2012
Location: Pacific Northwest, zone 8
Date: May 23, 2012
Location: Tabby's Garden
Date: 2012-05-31
semp making babies
Location: Pacific Northwest, zone 8
Date: Jul 1, 2012
Location: Fairfax, VA | July, 2022
Date: 2022-07-08
Location: Pacific Northwest, zone 8
Date: 2015-09-14
Location: my garden zone 7b NC, USA
Date: 2013-06-24
Location: Pacific Northwest, zone 8
Date: 2016-01-18

Date: 2014-08-31

Date: 2015-09-13
Location: Pacific Northwest, zone 8
Date: 2014-10-14
Photo by jkbingh
Location: Fairfax, VA | June, 2022
Location: South Jordan, Utah, United States
Date: 2020-06-16
Location: Fairfax, VA | September, 2023
Date: 2023-10-15
This plant is tagged in:
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Comments:
  • Posted by valleylynn (Oregon City, OR - Zone 8b) on Nov 6, 2011 7:06 PM concerning plant:
    Horst Diehm site http://www.semperhorst.de/Dieh... Syn 'Monstrosum' syn /. Cotyledon persicum hort. /. Umbilicus persicus hort syn. /. Umbilicus syriensis hort. / 1900 This unusual mutation was found by Ronald Byles in 1958. It was named after Mr. Griggs who ultimately determined it to be a Sempervivum.

    A S. calcareum mutation.
Discussion Threads about this plant
Thread Title Last Reply Replies
Such a beautiful semp! by sandnsea2 May 23, 2012 1:55 PM 1
Wow what a "Surprise" by gardengus Jul 1, 2012 7:18 AM 0
Sempervivum calcareum 'Grigg's Surprise' by valleylynn May 4, 2015 9:33 PM 0

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