Kenaf (Hibiscus cannabinus)

Kenaf

Hibiscus cannabinus

Its fibrous stems support both craft and beauty, a dual-purpose hardy annual. Tall herbaceous flowering plant; common names: kenaf, deccan hemp.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Full sun exposure is preferred for optimal growth, flowering, and fiber production; tolerates partial shade but may reduce stem height and flower output
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Watering Keep soil consistently moist during active growth periods; avoid overwatering to prevent root rot, allowing the top 2 cm of soil to dry slightly between waterings
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Temperature Thrives in warm tropical to subtropical temperatures; cannot tolerate frost, with growth stunted below 12°C
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Characteristics

  • Leaf: Palmate, lobed leaves (3–7 lobes) with serrated margins, rough textured
  • Flower: Pale yellow to creamy white flowers with a deep maroon central eye, 5 broad petals
  • Stem: Thick, fibrous, green to reddish-brown stems with dense fine pubescence
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Care Guide

Watering

Maintain consistent soil moisture; water deeply when the top 2 cm of soil feels dry

Fertilization

Apply balanced slow-release fertilizer at planting time to support early stem growth. Avoid over-fertilization with nitrogen to prevent excessive leaf growth at the expense of stem fiber development

Composted banana peel tea:Steep fully composted banana peels in water for 3 days; dilute the tea 1:20 with water before applying as a root drench to avoid nutrient burn
Pruning
  • Remove spent flowers to encourage extended blooming through early autumn
  • Thin overcrowded stems to improve air circulation and reduce the risk of fungal diseases
  • Cut back the entire plant to ground level after flowering to collect fibrous stems for craft use or composting
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains anthocyanins and glycosides that may cause vomiting, diarrhea, and reduced appetite

Humans: Ingestion of large amounts may cause mild gastrointestinal upset including nausea and abdominal cramping

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Garden Uses & Culture

Culture: N/A

Usage: Fibrous stems used for paper, rope, textiles, and biodegradable packaging; grown as an ornamental flowering plant in garden borders