How to care for Mammillaria spinosissima “Un Pico”

Mammillaria spinosissima Un Pico

Spiny Pincushion Cactus

The Spiny Pincushion Cactus (Mammillaria spinosissima “Un Pico”) does not occur naturally, it is a cultivar of Mammillaria spinosissima. The wild type is native to Mexico and has much shorter spines.

As a young plant, this cactus grows globular and later columnar. It can reach up to 30 centimeters in height.

Spiny Pincushion Cactus

Mammillaria spinosissima “Un Pico” plant care


Mammillaria spinosissima “Un Pico” likes it sunny and does well in the hot summer sun. Places with at least four hours of sun daily are perfect.

A summer residency in the garden or on the balcony is welcome.

Spiny Pincushion Cactus Mammillaria spinosissima Un Pico


Standard mixes for cacti are suitable, which can be used either pure or mixed with pumice gravel, bird sand or lava gravel.

If Mammillaria spinosissima “Un Pico” spends the summer in the garden and is in the rain, a semi-mineral mixture as described above is beneficial. Since, if the summer is rainy, it will not moisten that much.

Spiny Pincushion Cactus Un Pico
I use a semi-mineral soil with lava gravel for the Spiny Pincushion Cactus.


The substrate should be allowed to dry out between waterings.

In winter, especially if the Spiny Pincushion Cactus is overwintered in a cool place, the soil should be kept mostly dry.

Spiny Pincushion Cactus areoles
Only one thorn grows from each of the areoles of Spiny Pincushion Cactus.


Liquid fertilizer may be given occasionally from spring through late summer.

For the first year after repotting, Mammillaria spinosissima “Un Pico” does not require any fertilizing.

Mammillaria spinosissima Un Pico areoles
Young areoles of Mammillaria spinosissima “Un Pico” are covered with fine hairs.


For flower development, it is good if this cactus is overwintered temperate to cool, at 41 to 59 °F (5 to 15 °C).