Frost Tolerance: Hardy to 28°F (-2°C)
Sun Exposure: Light shade in summer in Phoenix, full sun elsewhere
Origin: Central Mexico (Hidalgo state)
Growth Habits: Spherical, green cactus, forming 2-3 feet wide (60-90 cm) mounds as it ages, each stem up to 4 inches (10 cm)
Watering Needs: Regular water in summer
Propagation: Seeds, the best clones are propagated by offset.
The Mammillaria geminispina clumps readily and make large mounds in the wild. The sap of the Mammillaria geminispina is milky.
Blooming Habits:
The sparse deep pink or white with a deep pink center flowers are up to 0.5 inches in diameter (1.2 cm).
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