PlantFun
Plant Needs
Sunlight
Full direct sunlight for most of the day; provide partial shade during extreme midday summer heat to prevent sunscald
Watering
Water deeply only when the soil is completely dry; avoid standing water to prevent root rot
Temperature
Thrives in warm, dry conditions; protect from frost and temperatures below 5°C to prevent stem damage
Characteristics
- Leaf: Modified into sharp, short spines arranged along 15–20 vertical ribs
- Flower: Bright yellow, funnel-shaped blooms emerging from the crown
- Stem: Dense green globular stem with woolly areoles at rib nodes
Care Guide
Watering
Water deeply when soil is fully dry; allow excess water to drain completely from the pot
Fertilization
Diluted cactus-specific fertilizer once monthly. Discontinue fertilization during autumn and winter dormancy
Crushed eggshell powder topdress：Crush dried, thoroughly rinsed eggshells into a fine powder; sprinkle lightly on the soil surface, avoiding direct contact with the stem to prevent rotPruning
- Gently remove dried flower remains and dead spines to maintain appearance
- Detach small offset pups in spring for propagation without damaging the main stem
- Avoid cutting into the main globular stem, as minimal pruning is required for this species
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats
Humans: No known toxic effects for humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental succulent for container displays, rock gardens, and xeriscaping
