Goat's Horn Cactus (Astrophytum capricorne)

Goat's Horn Cactus

Astrophytum capricorne

Its curved spines look like goat horns, a quiet desert gem. Xerophytic succulent cactus.

Full sun
0.5/week
Beginner
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Plant Needs

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Sunlight Requires full direct sunlight for 6–8 hours daily; can tolerate partial shade during extreme midday summer heat
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Watering Water deeply only when the soil is completely dry; avoid overwatering to prevent root rot and stem decay
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Temperature Thrives in 18–30°C; can tolerate brief light frost down to 5°C but avoid prolonged cold exposure
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Characteristics

  • Leaf: Modified into curved, horn-like spines (5–8 per areole) with white chalky flecks (farina)
  • Flower: Large, daisy-like yellow blooms with bright orange central discs
  • Stem: Globular to short columnar, deep green with white powdery scales
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Care Guide

Watering

Water thoroughly when soil is fully dry (every 10–14 days)

Fertilization

Diluted cactus fertilizer once every 4 weeks. Use low-nitrogen, high-phosphorus fertilizer to support blooming without promoting excessive stem growth

Composted banana peel tea:Compost banana peels for 2–3 months, steep in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations
Pruning
  • Gently remove dead or discolored spines and damaged stem tissue
  • Trim offset pups in spring for propagation if desired
  • Avoid handling the stem excessively to preserve the protective white farina coating
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic to cats; no adverse effects reported

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: Symbolizes resilience and quiet desert beauty in succulent gardening

Usage: Ornamental cactus for rock gardens, succulent arrangements, or indoor sunny displays