About
Mammillaria spinosissima, the spiny pincushion cactus, is usually a solitary, cylindrical cactus to 30 cm tall and 10 cm in diameter with dense, bristly, red-brown or white central spines and cream radials. A ring of carmine-pink flowers 2 cm long is produced near the apex in late spring and summer. A handsome and easy-care cactus for a sunny greenhouse bench.
About the genus
Mammillaria are spherical to cylindrical, spiny cacti from Mexico and neighbouring regions, often forming clusters, with prominent tubercles and a ring of funnel-shaped flowers near the stem apex in late spring and summer. Popular and easy-care cacti for a sunny greenhouse bench or windowsill.
Growing conditions
SunlightFull sun
Soil typeLoam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureWell-drained
AspectEast-facing, South-facing, North-facing
ExposureSheltered
UK hardinessH2
Plant details
Plant typeCactus Succulent, Conservatory Greenhouse
HabitColumnar upright
FoliageEvergreen
Height0.1-0.5 metres
Spread0-0.1 metre
Time to full height5-10 years
Suggested usesPatio and container plants
Native toC Mexico
Care notes
CultivationGrow under glass in a standard cactus compost, in bright, filtered light, with low humidity. When in growth water moderately and feed every two or three weeks with a balanced liquid feed. Keep almost dry in the winter
PruningNo pruning required
PropagationPropagate by seed sown at 19 - 24°C in early spring or by offsets
Pest resistanceMay be susceptible to mealybugs
Disease resistanceGenerally disease-free