Tephrocactus geometricus (SA/WA Prohibited)

Tephrocactus geometricus is a slow-growing South American cactus recognised for its rounded, geometric segments. These grey-green spheres form small clusters over time and produce delicate pale flowers in warm, bright conditions.

Key Characteristics

• Stem: Distinct rounded segments forming compact clumps.
• Colour: Grey-green to bluish tones depending on light.
• Growth Habit: Slow, segmented growth with minimal branching.
• Seasonality: Most active in spring-summer; very slow in winter.
• Flowers: Cream to pale pink blooms in warm bright weather.

Care

• Light: Bright light with several hours of sun; ideal on a sunny windowsill.
• Water: Water sparingly; allow the mix to fully dry between waterings.
• Humidity: Naturally low humidity plant; keep dry around the body.
• Temperature: Best at 18-32°C. Protect from frost and cold moisture.
• Media: Very free-draining cactus mix with added mineral grit.
• Feeding: Occasional low-nitrogen cactus fertiliser during spring-summer.