PlantFun
Plant Needs
Sunlight
Full direct sunlight for 6–8 hours daily; tolerate partial shade during extreme midday summer heat
Watering
Allow soil to fully dry between deep waterings; avoid overwatering to prevent root rot
Temperature
Thrives in 18–30°C; tolerate brief dips to 5°C but avoid prolonged frost exposure
Characteristics
- Leaf: Modified into sharp, yellowish spines arranged in vertical ribs along stems
- Flower: Large, white, fragrant nocturnal blooms that close by mid-morning
- Stem: Thick, fleshy green columnar stems with 8–12 prominent, rounded ribs
Care Guide
Watering
Water thoroughly when top 10–15 cm of soil is completely dry
Fertilization
Diluted cactus fertilizer once monthly. Cease fertilization during autumn and winter dormancy
Eggshell powder top-dress：Crush fully dried eggshells into fine powder; sprinkle 1–2 tbsp on soil surface; avoid direct contact with stems to prevent moisture buildupPruning
- Remove dead, discolored, or damaged stem segments to maintain plant health
- Trim overgrown side shoots to preserve the upright columnar form
- Disinfect pruning tools with rubbing alcohol before use to prevent disease transmission
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-confirmed non-toxic; spine contact may cause mild skin irritation
Humans: No systemic toxicity; spine punctures may cause local pain or minor infection
Garden Uses & Culture
Culture: N/A
Usage: Ornamental desert garden specimen; some varieties produce edible, sweet red fruit
