Golden Rat Tail Cactus (Cleistocactus winteri)

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Sunlight Bright full sun to partial sun; tolerate mild shade but reduced flowering may occur in low light

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Watering Water deeply only when the entire soil substrate is completely dry; avoid standing water to prevent root rot

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Temperature Thrives in 15–25°C; tolerate brief light frosts down to 5°C if soil is kept dry

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Stem: Slender cylindrical golden-green stems with dense yellow radial spines, growing in trailing clumps
Flower: Tubular, bright red to orange diurnal blooms, up to 6 cm long
Fruit: Small oval red berries, rarely produced indoors

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Watering

Water when top 5–7 cm of soil is dry; increase frequency in hot, dry weather

Fertilization

Diluted cactus fertilizer once monthly. Discontinue fertilizing during winter dormancy to prevent nutrient burn

Banana peel compost tea：Use fully composted banana peels; dilute 1:20 with water for root drench; avoid raw peels to prevent pest infestations

Pruning

Trim overgrown or damaged stems to maintain desired hanging shape
Remove any yellowed or rotting stem sections to improve air circulation
Propagate trimmed stem cuttings by drying for 2–3 days before planting in cactus mix

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no systemic toxicity reported

Humans: Non-toxic to humans; spines may cause minor mechanical irritation if handled roughly

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Culture: N/A

Usage: Ornamental hanging plant; outdoor rock garden accent in warm climates