Photo by Melody

PlantFiles: Medusa Head
Euphorbia flanaganii

Family: Euphorbiaceae (yoo-for-bee-AY-see-ee) (Info)
Genus: Euphorbia (yoo-FOR-bee-uh) (Info)
Species: flanaganii (flan-uh-GAN-ee-eye) (Info)

One vendor has this plant for sale.

12 members have or want this plant for trade.

Cactus and Succulents

under 6 in. (15 cm)
6-12 in. (15-30 cm)

12-15 in. (30-38 cm)

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:
Sun to Partial Shade

Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Chartreuse (Yellow-Green)

Bloom Time:
Mid Summer

Grown for foliage

Other details:
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

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:
From herbaceous stem cuttings
Allow cut surface to callous over before planting

Seed Collecting:
Unknown - Tell us

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By emdc
Thumbnail #1 of Euphorbia flanaganii by emdc

By Happenstance
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By palmbob
Thumbnail #3 of Euphorbia flanaganii by palmbob

By Happenstance
Thumbnail #4 of Euphorbia flanaganii by Happenstance

By Happenstance
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By KactusKathi
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By palmbob
Thumbnail #7 of Euphorbia flanaganii by palmbob

There are a total of 33 photos.
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4 positives
1 neutral
No negatives

Gardeners' Notes:

Positive mrbetelman On Mar 10, 2015, mrbetelman from Felton, CA wrote:

I have a larger Medusa head which I have had for many years. I have grown several "babies" off of the mother, but suddenly the larger plant seems to be very unhappy. The arms are turning yellow, withering and falling off. It sits in close proximity to and gets the same treatment as another plant which is doing beautifully. Can anyone offer a suggestion?

Positive zelisheva On Apr 7, 2013, zelisheva from jerusalem
Israel wrote:

It looks great, growing well in full sun in pot in my zone 10 Israel desert garden. But the chartreuse blooms are gone, will it rebloom?? Gardening here sure is a lot different from gardening in New York!!

Neutral JonasKragebaer On Dec 26, 2009, JonasKragebaer from martofte
Denmark (Zone 7b) wrote:

my dad medusa head is as good as dead but i managed to save a few "hairs" or branches, i stuck them in the ground and they have grown roots now. i was wondering how a plant grown from a branch will look like, is it gonna look exactly like a from grown from seed or is it gonna look different?

Positive palmbob On Apr 25, 2005, palmbob from Acton, CA (Zone 8b) wrote:

This is a really easy to grow plant despite it's exotic look... handles southern California outdoor temps well and grows quite quickly into a nice, caudiciform medusa head plant. Great for pots as well as putting in the ground. Handles full sun, as well as performing pretty well as a house plant (though needs bright light, and still, it will get quite 'leggy'). And the great thing about it is it's cheap and easy to find (nearly all garden outlet stores will have this plant, now and then, at least). Easy to handle and 'branches' pretty bendable and sturdy, so exposure to sap not that big a deal. Still, avoid breaking 'arms' and then rubbing sap in your eyes, or you will be sorry.

Noticed this plant mysteriously showing up in the planter boxes where it didn't exist before... though a 'mother' plant is in the same box several yards away. Not sure how, but looks like this could be an invasive species. This is the only 'weed' caudiciform plant I have grown. I would rate it as one of the easiest Euphorbias to grow in both pots and in the landscape in southern California, highly tolerant of shade, sun, excess water and drought.

Crested forms exist and also quite common at garden outlet centers. Normal forms will suddenly crest now and then, too.

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

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


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

Chandler, Arizona
Goodyear, Arizona
Clayton, California
Clovis, California
Fairfield, California
Felton, California
Long Beach, California
Nipomo, California
Perris, California
Reseda, California
Riverside, California
Simi Valley, California
Spring Valley, California
Stockton, California
Vista, California
Yosemite Lakes, California
Philadelphia, Pennsylvania

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