Mammillaria geminispina (2020)

Kevin Romine’s new mammillaria should be fairly easy to grow. Photo by Chris Walker.

By Kevin Romine (January 2020)

Mammillaria geminispina is a twin-spined cactus native to central Mexico. It can grow 10 inches tall by 20 inches wide. It is a densely spined, flowering cactus. Some species cluster, while others remain solitary.

M. geminispina is a fairly easy cactus to grow and does not require a lot of attention. It needs an abundance of filtered light to aid in spine formation. If it is kept too shaded, it could possibly be prone to rotting as a result of overwatering. It needs a well-draining, mineral-rich soil that will allow the roots to breathe.

Propagation is by seeds or offsets from a mature plant. The best propagation results are from offsets.

Sources:

Llifle Encyclopedia of Cacti – http://www.llifle.com/Encyclopedia/CACTI/
Wikipedia – https://en.wikipedia.org