Spiny Pincushion Cactus
Mammillaria spinosissima · Native to Mexico (Morelos, Guerrero, Oaxaca)
As its name promises, one of the most heavily spined of all Mammillarias — a dense cylinder of interlocking white radial and bold central spines that is as tough as it looks.
Available in 4½ inch
Care
Light
Full, direct sun to keep the plant compact and the spine colors vivid.
Water
Let dry completely between waterings. Minimal in winter.
Soil & Feeding
Fast-draining cactus mix. Feed lightly in the growing season.
Quick Tip
Great for beginners — extremely tough and forgiving of occasional missed waterings.
Details
Mammillaria spinosissima lives up to its name with extraordinary spine density, producing rings of pink to red flowers in spring that peek through the dense spine covering.
- ✅ Extraordinary spine density — one of the spiniest Mammillarias
- ✅ Upright, cylindrical form that grows taller with age
- ✅ Blooms with rings of pink to carmine flowers in spring
Size
Available in a 4½ inch pot — a great starter size that’s easy to place on a windowsill, desk, or shelf, and simple to repot as it grows.
Good to Know
⚠️ Extremely dense, sharp spines — handle only with thick leather gloves. Keep away from children and pets.
Plant Bio
Mammillaria spinosissima · also called the Most-Spiny Mammillaria
Native to the warm, rocky slopes of southern Mexico, Mammillaria spinosissima is aptly named — it is one of the most densely spined plants in a genus already known for its spines.
Its cylindrical body is virtually hidden beneath dense, interlocking white radial spines and longer, often reddish central spines that project boldly outward. The effect is of a plant fully armored against the world.
Despite its formidable appearance, it is an easy-care, reliable bloomer that produces rings of pink to carmine flowers in spring — a cheerful surprise on such a fierce-looking plant.
What makes it special?
- One of the most spine-dense Mammillarias — the body is nearly invisible beneath the spines.
- The combination of white radials and colored centrals creates a layered, textural effect.
- Extremely tough and forgiving — a great choice for beginners who want a dramatic plant.
Note: Extremely dense, sharp spines — handle only with thick leather gloves. Keep away from children and pets. Grown for ornamental purposes only.