Mammillaria spinosissima - Red Headed Irishman - Statement Plants

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Mammillaria spinosissima - Red Headed Irishman

An easy to grow, low maintenance cactus. A ring of deep pink flowers at the top of the plant bloom in spring.

Full sun to part shade

Drought tolerant

Well drained gritty soil

Partly frost tolerant (see notes)

Pot Size

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Plant size and colour will vary depending on season. Plants posted in pots.

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  • Mammillaria spinosissima, commonly known as the 'Red Headed Irishman' due to the spines at the top of the plant becoming a rust colour. A cylindrical cactus with a dark green stem hidden by masses of spines. It blooms in spring with a ring of deep pink flowers around the top of the stem.

    As with all cacti, M. spinosissima likes a very bright position, with some relief from afternoon sun. Plant in a very well drained cactus mix and water only when dry.


    Red-headed Irishman, Irish red-head
    Cactus spinosissimus, Neomammillaria spinosissima

    Plant height To 30cm
    Plant width Clusters to 20cm
    Habit Solitary or clustering
    Growth Cycle Perennial
    Foliage Dark green stem with masses of light coloured spines
    Flower A ring of deep pink around the apex
    Flowering time Spring to summer
    Toxicity Non toxic, but keep away from children and pets.