Guinea Hen Weed (Petiveria alliacea)

Guinea Hen Weed

Petiveria alliacea

It carries garlicky scents to repel pests, a tough medicinal herb. Perennial herbaceous plant; common names: anamu, guinea hen weed.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; tolerates partial shade; avoid intense midday direct sun to prevent leaf scorch
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Watering Water when the top 2 cm of soil feels dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives in warm tropical temperatures; cannot tolerate frost or temperatures below 15°C
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Characteristics

  • Leaf: Simple, ovate to lanceolate leaves with smooth margins; emit garlic-like odor when crushed
  • Flower: Small, greenish-white, spike-like inflorescences with tiny individual blooms
  • Stem: Slender, branching green stems covered in fine, soft hairs
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase watering frequency during hot, dry periods

Fertilization

Apply diluted organic feed every 2 weeks. Use nitrogen-balanced organic feed to support foliage growth without promoting leggy stems

Banana peel compost tea:Soak fully composted banana peels in water for 3 days; dilute 1:20 for root drench; discard solid debris to avoid pest infestations and odors
Pruning
  • Trim back leggy stems in early spring to encourage compact, bushy growth
  • Remove yellowing or damaged leaves regularly to maintain plant health and improve airflow
  • Cut back spent flower spikes to redirect energy to foliage production
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion can cause vomiting, diarrhea, lethargy, and potential central nervous system depression

Humans: Ingestion of large quantities may cause gastrointestinal upset including nausea and abdominal pain

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Garden Uses & Culture

Culture: Used in traditional Caribbean and South American medicine for immune support and anti-inflammatory purposes; symbolizes healing and protection

Usage: Medicinal herb, natural garden pest repellent due to garlicky scent