Alphabetical Plant Listing

Euphorbia mammillaris (Corncob Cactus)

Corncob Cactus, Corncob Euphorbia, Corn Cob Plant, Indian Corn Cob


Euphorbia mammillaris (Corncob Cactus) is a short stemmed, dioecious shrublet producing a dense cluster. The chalky green stems, up to 14 in. tall (35 cm), are thick, erect, and ribbed. Thick, blunt spines are occasionally present and scattered around the stems. Usually there are many club-like lateral branches. In late winter to early summer, Corncob Cactus produces yellow flowers that are reduced in size and aggregated into a cluster (cyathium) at the tip of each stem. Relatively fast growing, drought tolerant and long lived once established.

  • Typically grows up to 10-14 in. tall (25-35 cm). It requires a little pampering to become established, but once it is, it is self-sufficient.
  • Performs best in full sun in well-drained soils. Can tolerate moderate shade. Water regularly during the active growing season. No water should ever be allowed to stand around the roots. Keep almost completely dry in winter. Protect from strong winds.
  • Perfect addition to beds, borders, Mediterranean Gardens.
  • No serious pest or disease issues. Keep an eye out for mealy bugs.
  • Can be pruned for shape and branching.
  • Propagate by cuttings in late spring to summer.
  • Native to South Africa.
  • All Euphorbias contain a white sap that can be irritating to eyes and mucous membranes. If contact is made with this white sap, take care to not touch face or eyes before washing hands with soap and water.

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Requirements

Hardiness 9 – 11
Plant Type Cactus - Succulents
Plant Family Euphorbia - Spurges
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early,Mid,Late)
Summer (Early,Mid,Late)
Fall
Winter
Height 10" – 2' (25cm – 60cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Mediterranean Garden

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 9 – 11
Plant Type Cactus - Succulents
Plant Family Euphorbia - Spurges
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early,Mid,Late)
Summer (Early,Mid,Late)
Fall
Winter
Height 10" – 2' (25cm – 60cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Mediterranean Garden

Great Plant Combination Ideas with Euphorbia - Spurges

Guides with Euphorbia - Spurges

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