PlantFun
Plant Needs
Sunlight
Requires full direct sunlight daily; tolerates intense desert heat and no shade
Watering
Deep, infrequent watering; allow soil to completely dry between sessions to prevent root rot
Temperature
Tolerates brief light frost (down to 5°C); thrives in hot, arid daytime temperatures
Characteristics
- Stem: Thick, ribbed columnar stems with prominent, comb-like spine clusters
- Leaf: Reduced to sharp, yellowish spines (no true foliage leaves)
- Flower: White, funnel-shaped nocturnal blooms with mild fragrance
Care Guide
Watering
Deep soak every 10–14 days; ensure water drains fully
Fertilization
Diluted low-nitrogen cactus feed once every 6 weeks. Do not fertilize during dormancy in autumn and winter
Eggshell powder topdressing：Finely crush dried eggshells and sprinkle thin layer on soil surface; avoid direct contact with stem base to prevent moldPruning
- Remove dead or damaged spine clusters to maintain plant appearance
- Trim off offset pups at base for propagation if desired
- Prune broken or diseased column sections only to prevent spread of infection
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no reported adverse effects
Humans: No known toxic effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Ornamental desert landscaping; traditional indigenous use as tool material from woody stems
