PlantFun
Plant Needs
Sunlight
Requires full direct sunlight for healthy growth and woolly crown development; tolerates partial shade in extreme heat
Watering
Allow soil to dry completely between waterings; avoid overwatering to prevent root rot
Temperature
Thrives in warm, arid conditions; protect from frost below 10°C to prevent stem damage
Characteristics
- Stem: Cylindrical blue-green stems with 8–12 prominent ribs; covered in dense white woolly areoles along rib edges
- Spines: 8–10 short golden radial spines and 1–2 longer central spines per areole
- Flower: Night-blooming funnel-shaped flowers, white to pale pink, up to 8 cm long
- Fruit: Small red fleshy berries, edible when fully ripe
Care Guide
Watering
Water deeply when soil is fully dry; reduce frequency during extreme heat to avoid sunscald
Fertilization
Diluted low-nitrogen cactus fertilizer once monthly. Fertilize only during active growth to promote flowering
Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle lightly on soil surface, avoiding direct contact with stems; no dilution neededPruning
- Remove dead or damaged stem segments with sterile tools to maintain plant health
- Trim offset pups from the base for propagation if desired
- Avoid pruning the woolly crown to preserve the plant's characteristic appearance
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; spines may cause minor physical injury
Humans: No known toxic effects; spines may cause physical irritation if handled improperly
Garden Uses & Culture
Culture: N/A
Usage: Ornamental cactus for xeriscaping, rock gardens, or indoor succulent collections; ripe fruit is edible raw
