General Plant Information (Edit)
Plant Habit: Shrub
Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 9a -6.7 °C (20 °F) to -3.9 °C (25 °F)
Leaves: Evergreen
Flowers: Showy
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: Red
Bloom Size: Under 1"
Flower Time: Year Round
Suitable Locations: Xeriscapic
Dynamic Accumulator: B (Boron)
Wildlife Attractant: Bees
Hummingbirds
Resistances: Deer Resistant
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.
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: With thorns/spines/prickles/teeth

Image
Common names
  • Euphorbia
  • Sijou
  • Sijwu
  • Crown of Thorns
  • Christ's Thorn

Photo Gallery
Location: Royal Botanic Gardens, Kew
Date: 2017-10-09
Location: Royal Botanical Gardens, Kew, London
Date: 2013-04-29
Location: Dothan, AL
Date: 2019-10-14
Crown of Thorns from the Dothan Botanical Gardens
Location: Howard Peters Rawlings Conservatory, Baltimore, Maryland
Date: 2017-02-01
Location: Royal Botanic Gardens, Kew
Date: 2017-10-09
Location: Riverhead, NY
Date: 2022-06-12
first flower
Location: Howard Peters Rawlings Conservatory, Baltimore, Maryland
Date: 2017-02-01
Location: Dothan, AL
Date: 2019-10-14
Crown of Thorns species at the Dothan Botanical Gardens
Location: SE Michigan
Date: 2017-08-12
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-03-19

Thorns
Uploaded by SongofJoy
Location: St. Thomas V.I.
Location: Rio de Janeiro town, Brazil
Date: 2013-12-04

Date: 2010-01-01
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-03-19
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-03-19
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2008-08-30
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2008-08-30
Plant Events from our members
MySecretIslandGarden On February 4, 2023 Bloomed
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