PlantsEuphorbias→Corn Cob Euphorbia (Euphorbia mammillaris)

Common names:
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General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Minimum cold hardiness: Zone 8b -9.4 °C (15 °F) to -6.7 °C (20 °F)
Plant Height: 18 inches
Plant Spread: 2 feet
Fruit: Pops open explosively when ripe
Flowers: 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"
Suitable Locations: Xeriscapic
Uses: Will Naturalize
Dynamic Accumulator: B (Boron)
Resistances: Rabbit 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.
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: Tolerates poor soil
With thorns/spines/prickles/teeth


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Posted by Baja_Costero (Baja California - Zone 11b) on May 13, 2020 9:40 PM

Highly branched columnar succulent Euphorbia with tubercles tightly packed together in rows, making each stem look a bit like a corn cob. From near the Cape in South Africa. Very popular and widespread in cultivation. Branches appear at the base and/or above. This plant becomes a subshrub when mature, and is extremely well behaved in containers. It may bear intermittent spines (actually sterile peduncles) that are not particularly deadly or ornamental. Very small, ephemeral vestigial leaves appear on new growth. Plants are male or female (dioecious) and cyathia are borne near the tips a few times a year. This plant hybridizes easily with polygona and related plants. It is resistant to hares and confers this resistance upon some hybrids.

Very easy to propagate from cuttings. Said to be an easy, but potentially short-lived stock for grafting. This plant may be confused with some forms of the highly variable E. fimbriata. A pale green variegated version of mammillaris exists and is also popular and well-behaved in cultivation. Both develop attractive pinkish or reddish overtones with exposure to the sun.

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ethompson92 On April 6, 2020 Obtained plant
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Discussion Threads about this plant
Thread Title Last Reply Replies
Love it! by goldfinch4 Mar 29, 2012 6:12 PM 8
ID question by Baja_Costero Jun 7, 2020 10:19 AM 0
Got a whole heap of unlabelled ones from a nursery sale need help with their ID by JimsPlants Mar 27, 2021 5:07 AM 6
Identify this cactus please by Samhoge Sep 24, 2020 6:25 PM 5
Share your Euphorbia photos by Baja_Costero Apr 14, 2021 10:09 PM 119
I bought these 2 by skopjecollection Mar 13, 2020 11:14 AM 12
Cactus ID by BennyUK Jan 12, 2020 11:02 AM 5
Best performing succulents/cacti in full sun and dry heat, in your garden by _Bleu_ Mar 1, 2019 10:28 AM 30
What is this brown spot on my cactus? by jkayroberts82 Jan 28, 2019 12:49 PM 3
Please ID (is it a Euphorbia)? by voteforme Nov 7, 2018 12:27 AM 3
Lophophora williamsii by Shinnen Jul 21, 2020 11:44 PM 68
Euphorbia Show and Tell and give away by Stush2019 Aug 9, 2018 2:38 PM 120

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