PlantFun
Plant Needs
Sunlight
Full direct sunlight for 6–8 hours daily; provide partial shade during peak summer midday heat to prevent sunscald
Watering
Water deeply only when the entire soil medium is completely dry; avoid standing water to prevent root rot
Temperature
Thrives in 15–30°C; tolerates brief light frosts down to 5°C if soil is kept fully dry
Characteristics
- Leaf: Modified into sharp yellowish spines; 1–3 central spines per radial areole
- Flower: Large funnel-shaped white blooms (15–20 cm long), opening at dusk and fading by mid-morning
- Stem: Globular to slightly cylindrical green stems with 12–18 prominent vertical ribs
Care Guide
Watering
Water thoroughly when soil is fully dry; allow excess water to drain completely
Fertilization
Diluted balanced cactus fertilizer once monthly. Discontinue fertilization during winter dormancy to prevent stress
Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle a thin layer on soil surface, avoiding direct contact with stems to prevent mold growthPruning
- Remove dead or discolored offsets to maintain cluster health and airflow
- Trim overgrown or misshapen stems to preserve a compact, symmetrical form
- Gently clear fallen spines from the soil surface to reduce puncture risk during repotting
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic; no known adverse effects from ingestion
Humans: No systemic toxicity; minor skin irritation may occur from spine punctures
Garden Uses & Culture
Culture: N/A
Usage: Ornamental succulent for rock gardens, succulent arrangements, and indoor sunny displays
