General Plant Information (Edit)
Plant Habit: Cactus/Succulent
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Dry Mesic
Dry
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Plant Height: 4 inches
Plant Spread: 12 inches or more
Flowers: Inconspicuous
Other: In the genus Euphorbia, the flowers are reduced in size and aggregated into a cluster of flowers called a cyathium (plural cyathia). This feature is present in every species of the genus Euphorbia but nowhere else in the plant kingdom.
Flower Color: Green
Bloom Size: Under 1"
Flower Time: Fall
Suitable Locations: Xeriscapic
Dynamic Accumulator: B (Boron)
Resistances: Drought tolerant
Toxicity: Other: All members of the genus Euphorbia produce a milky sap called latex that is toxic and can range from a mild irritant to very poisonous.
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Dioecious

Image
Common names
  • Susanna's Spurge
  • Knoppiesnoors
  • Suzanne's Spurge
  • Euphorbia

Photo Gallery
Location: Baja California
Date: 2021-11-05
Male
Location: Baja California
Date: 2018-07-29
12 inch pot
Location: Baja California
Date: 2022-11-23
Location: Baja California
Date: 2019-11-16
12 inch pot
Location: Baja California
Date: 2017-09-14
12 inch pot
Location: Baja California
Date: 2016-11-12
Male
Location: Botanischer Garten München-Nymphenburg
Date: 2018-03-11
Location: Baja California
Date: 2012-11-06
Male parts blow away in the wind
Location: Baja California
Date: 2021-11-05
Main (original) head center
Location: Baja California
Date: 2022-12-11
Male
Location: 2007 Philadelphia Flower Show
Date: 2007-03-10
specimen plant
Photo by ljones26
Comments:
  • Posted by arctangent (Ann Arbor, Michigan - Zone 6a) on Dec 1, 2020 6:56 PM concerning plant:
    Disambiguation comment. The common name uses a 'z' in the name, Suzanne's Spurge, whereas the specific epithet uses an 's', viz. susannae. The problem is that a search on a misspelled species name, 'Euphorbia suzannae' lands on a completely different euphorbia species, Euphorbia suzannae-marnierae in the garden.org database. I have seen such a misspelling on a conservatory plant tag, and it may, in fact, be a fairly common mistake. Just be warned...
  • Posted by Baja_Costero (Baja California - Zone 11b) on Jun 4, 2017 11:25 PM concerning plant:
    Spineless South African succulent from the Little Karoo near Ladismith. May grow nearly flat to the ground or form a mound of dozens of small knobby green heads. The tubercles are arranged in 10-16 rows and point downward. The stem usually branches heavily, and can be impressive in old age. Plants are male or female. Fall cyathia are small and greenish or brown, appearing in great numbers near the tip of stems. Male cyathia appear on short peduncles but female cyathia are sessile. Provide excellent drainage and strong light in cultivation. With proper care a long lived container plant. Named after Susanna Muir (note spelling "s" not "z").
Discussion Threads about this plant
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Biodegradable plant bags by Morninglory12 Aug 5, 2018 12:20 AM 8

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