PlantFun
Plant Needs
Sunlight
Full direct sunlight; tolerates partial shade during extreme midday heat, requires at least 6 hours of daily direct sun for healthy growth
Watering
Water deeply only when the entire soil medium is completely dry; avoid overwatering to prevent root rot, the primary health risk
Temperature
Thrives in 18–30°C; tolerates brief dips to 10°C, but frost exposure will cause permanent stem damage
Characteristics
- Stem: Columnar, green, with 8–12 prominent ribs; covered in small areoles bearing yellowish spines
- Spines: 1 central spine (1–2 cm long) and 8–10 radial spines (0.5–1 cm long) per areole
- Flower: White, funnel-shaped, nocturnal, up to 8 cm long; blooms near stem apex
- Fruit: Small, red, fleshy, edible when ripe (rarely cultivated for fruit)
Care Guide
Watering
Water deeply every 10–14 days; let soil dry fully between waterings
Fertilization
Diluted low-nitrogen cactus fertilizer once monthly. Discontinue fertilization in autumn and winter when growth slows
Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle 1 tsp per pot every 3 months to improve soil drainage and boost calcium levels for healthy stem growthPruning
- Remove dead, discolored, or damaged stem segments to maintain plant health and appearance
- Trim offset pups from the base in spring for propagation
- Avoid over-pruning; only remove tissue that shows signs of disease or rot
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No known toxic effects to cats; spines may cause physical irritation if ingested or touched
Humans: No known toxic effects to humans; spines may cause minor physical injury if handled carelessly
Garden Uses & Culture
Culture: N/A
Usage: Ornamental cactus for xeriscaping, container gardening, and desert-themed displays
