Euphorbia, Crown of Thorns, Christ Plant, Siamese Lucky Plant 'Helena'

Euphorbiamilii

Family
Euphorbiaceae (yoo-for-bee-AY-see-ee)
Genus
Euphorbia (yoo-FOR-bee-uh)
Species
milii (MIL-ee-eye)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Evergreen
Smooth
Height
12-18 in. (30-45 cm)
Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
All parts of plant are poisonous if ingested
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Pale Yellow
Bloom Time
Blooms all year
Other Details
Category
Shrubs
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Pleasant Hill, California

Reseda, California

Fort Lauderdale, Florida

Gautier, Mississippi

Featured Videos

Gardener's Notes:

3
positives
0
neutral
0
negative
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T
(Zone 10b) | October 2021 | positive

Blooms most of the time in the year, even in mostly shade.

1
1
Liberty Hill, TX (Zone 8a) | October 2015 | positive

I grow it as a houseplant, in a very sunny window. I have 3 from cuttings that I rooted. They flower ever winter. Very unique, easy to ca...Read More

P
Acton, CA (Zone 8b) | October 2006 | positive

Nice, small, tightly clumping species that flowers prolifically year round. Stems smaller, about 1/2" in diameter. Intensely spiney, as...Read More

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