Botanical Name: Mammillaria gracilis
Common Names: Thimble Cactus, Thimble Cluster Cactus, Fragile Cactus
📌 Product Description
Mammillaria gracilis is a charming miniature cactus known for its dense clusters of small cylindrical stems covered in fine white spines. The compact stems grow closely together, forming attractive cushion-like clumps that gradually expand over time.
Despite its delicate appearance, this cactus is hardy and easy to grow. During the flowering season it produces small cream to pale yellow flowers that form a ring around the tops of the stems.
Because of its compact size and attractive clustering growth, Thimble Cactus is a popular choice for succulent collections, container gardens, and decorative cactus arrangements.
📏 Size When Fully Grown
Height: 5 – 10 cm
Spread: 10 – 20 cm (forms clusters over time)
Growth Habit: Clustering cactus forming dense cushions
Growth Rate: Moderate
🌱 Best Growing Conditions
Light: Full sun to bright light
Soil: Very well-draining cactus or succulent soil mix
Water:
• Water lightly during active growth
• Allow soil to dry completely between watering
• Reduce watering significantly during winter
Avoid overwatering as this can cause root rot.
Feeding: Apply a diluted cactus fertiliser during spring and summer if required.
Maintenance:
• Very low maintenance
• Handle carefully due to small spines
• Offsets detach easily and can be used for propagation
🌦️ Planting & Growing Season (South Africa)
Best Planting Time: Spring to early summer
Active Growth: Spring and summer
Flowering Season: Spring
Dormancy: Winter (reduce watering)
Climate Suitability: Suitable for most South African regions with well-drained soil
Frost Tolerance: Tolerates light frost if kept dry
🌼 Additional Benefits
• Attractive compact cactus clusters
• Easy to propagate from offsets
• Excellent container plant
• Very drought tolerant
• Ideal for cactus collections
🌿 Ideal Uses
✔ Cactus gardens
✔ Succulent collections
✔ Container displays
✔ Rock gardens
✔ Water-wise gardens

