PlantFun
Plant Needs
Sunlight
Full direct sunlight for 6–8 hours daily; provide partial shade during midday summer heat in arid regions to avoid sunscald
Watering
Allow soil to dry completely between waterings; avoid overwatering to prevent root rot, especially in cool months
Temperature
Thrives in 18–30°C; protect from frost below 10°C to prevent irreversible stem damage
Characteristics
- Leaf: Modified into sharp, short spines (6–8 per areole) along stem ribs
- Stem: Four-sided (tetragonal) green stems, branching into tiered, castle-like growth
- Flower: White, nocturnal blooms (rare indoors) with subtle sweet fragrance
Care Guide
Watering
Water thoroughly when soil is fully dry; reduce frequency during prolonged heatwaves to avoid sunscald
Fertilization
Diluted cactus fertilizer once monthly. Discontinue fertilization in autumn and winter when growth slows
Eggshell powder topdressing：Crush fully dried eggshells into fine powder; sprinkle lightly on soil surface; avoid direct contact with stems to prevent irritationPruning
- Trim overgrown or discolored stems to maintain the castle-like tiered shape
- Remove dead spines or damaged stem sections to improve overall appearance
- Repot and trim tangled, rotting roots in early spring using sterile pruning tools
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic; physical irritation from spines may occur
Humans: No toxic compounds; minor physical irritation from spines possible
Garden Uses & Culture
Culture: N/A
Usage: Ornamental succulent for indoor tabletops and outdoor xeriscaping
