Thimble Cactus
Scientific Name: Mammillaria gracilis Salm-Dyck
Synonym: Mammillaria fragilis
Family: Cactaceae
Mammillaria gracilis 'Pulchella'
Sunset®: 8-24, 29, 30
USDA: 9-10
Frost Tolerance: Hardy in Phoenix to 14°F (-10°C)
Sun Exposure: Light shade
Origin: Central Mexico (Hidalgo, Queretaro)
Growth Habits: Clumping globular cactus, heads are up to 4 inches tall (10 cm), 2 inches wide (5 cm)
Watering Needs: Regular water in summer
The Mammillaria fragilis clumps readily. Offsets are loosely connected to the parent.
Blooming Habits:
Yellowish white flower, 0.5 inches in diameter (1.2 cm).
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