PlantFun
Plant Needs
Sunlight
Requires full direct sunlight for most of the day; tolerates partial shade during extreme midday heat
Watering
Allow soil to dry completely between waterings; avoid overwatering to prevent root rot
Temperature
Thrives in warm desert temperatures; tolerates brief light frosts down to 5°C but avoids prolonged cold exposure
Characteristics
- Leaf: Reduced to sharp, needle-like spines (toothpicks) arranged in vertical ribs
- Flower: Large, white, nocturnal blooms with sweet fragrance
- Stem: Thick, green columnar stem with 10–17 prominent ribs; grayish bark with age
Care Guide
Watering
Water deeply once every 10–14 days when soil is fully dry
Fertilization
Diluted cactus fertilizer once monthly. Cease fertilization in autumn and winter when growth slows significantly
Eggshell powder topdress：Crush clean, dried eggshells into fine powder; sprinkle lightly on soil surface; avoid direct contact with the stem to prevent irritationPruning
- Remove dead or damaged spines and stem segments to maintain tidy appearance
- Trim overgrown side branches in early spring to control plant shape
- Avoid pruning the main central stem unless it is damaged or diseased
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No recorded toxicity to cats
Humans: No known toxic effects on humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental desert landscaping; large container cultivation for indoor focal points
