Corn Cob Euphorbia, Corkscrew

Euphorbia mammillaris

Family: Euphorbiaceae (yoo-for-bee-AY-see-ee) (Info)
Genus: Euphorbia (yoo-FOR-bee-uh) (Info)
Species: mammillaris (mam-mil-LAIR-iss) (Info)
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Cactus and Succulents

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Where to Grow:

Suitable for growing in containers

This plant is suitable for growing indoors


6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


6-9 in. (15-22 cm)


USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

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)

Sun Exposure:

Full Sun

Sun to Partial Shade


Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Chartreuse (Yellow-Green)


Bloom Time:

Late Winter/Early Spring

Mid Spring

Late Spring/Early Summer


Grown for foliage



Other details:

Unknown - Tell us

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:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Brea, California

Clayton, California

Fairfield, California

Hayward, California

Reseda, California

San Diego, California

Valley Village, California

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Gardeners' Notes:


On May 7, 2010, Jensilaedi from Perth
Australia wrote:

slow growing but cheerful plant. shade and sun will not hurt it.

sap may or may not be poisonous. For those persons who definitely have an allergy/skin sensitivity will react to it. If you're not sensitive it'll just make your skin a little bit itchy and nothing more.

I have this plant potted and have been looking for a name for years! thanks..


On Oct 23, 2009, robcorreia from San Diego, CA (Zone 10b) wrote:

I love this plant and I've never had any of the allergic reactions to the sap.


On Aug 17, 2009, DracoVolans from Crestline, CA (Zone 8b) wrote:

This species is happy and healthy living in the Mother-In-Law's cactus garden and I thought it was one of the neatest looking things... She 's been cutting back and seriously pruning many of the greenies that have overgrown and she tossed a "finger" of this in a box for me, along with another possible Euphorbia species (still researching that one). She knows I'm a plant freak and seems to like seeing how I do with species I'm unfamiliar with (so far, my success-rating is pretty good- I've only killed one plant she's given me so far, but it was pretty far gone by the time I got to it). My rating of neutral will likely change, depending on how my "finger" does in it's new environment. :) I'm curious if I have the chartreuse-blooming colour or the pretty red-violet variety. My "finger" ... read more


On Aug 28, 2003, Happenstance from Northern California, CA wrote:

Will remain mostly green if grown indoors or in a greenhouse situation. Put outside in late Spring in 9b, full sun will turn it completely red/yellow. Dappled shade will allow some stem to remain green while those on the sunny side will color up. Likes fish emulsion diluted about 1/2 strength.

Like all Euphorbia HANDLE WITH CARE, the latex/sap is dangerous and can cause skin rash, itching and general discomfort.