Thorn-crested Agave (Agave univittata)

Thorn-crested Agave

Agave univittata

Sharp, linear leaves hold desert quiet like a living sculpture. Xerophytic succulent rosette; common name: Thorn-crested Agave.

Full sun
0.5/week
Beginner
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Plant Needs

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Sunlight Full direct sunlight for optimal compact rosette growth; tolerates partial shade but may lose its tight form
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Watering Allow soil to dry completely between waterings; avoid overwatering to prevent root rot and fungal growth
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Temperature Tolerates mild frost down to 5°C; thrives in warm arid conditions; avoid prolonged exposure to temperatures below 0°C
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Characteristics

  • Leaf: Narrow, rigid linear leaves with a central white stripe, tipped with a sharp dark spine; margins have small hooked thorns.
  • Flower: Tall 3–6 m stalk bearing clusters of tubular yellow flowers.
  • Stem: Short, subterranean stem hidden beneath the rosette.
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Care Guide

Watering

Water deeply once every 10–14 days; let soil dry fully between waterings

Fertilization

Diluted low-nitrogen cactus fertilizer once every 60 days. Avoid over-fertilizing to prevent soft, weak leaf growth

Eggshell powder topdress:Bake eggshells at 180°C for 10 minutes to kill pathogens, crush into fine powder, and sprinkle a thin layer around the rosette base; avoid direct contact with leaves
Pruning
  • Remove dead, brown leaves from the rosette base to maintain appearance and improve airflow.
  • Trim the flower stalk after blooming, as the parent rosette will die following flowering.
  • Remove small offset pups for propagation; wear thick gloves to avoid injury from sharp leaf thorns.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains saponins; ingestion causes mild gastrointestinal irritation and mouth discomfort

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Garden Uses & Culture

Culture: Symbolizes endurance and resilience in arid landscapes

Usage: Ornamental succulent for xeriscaping; historically used for fiber production