Water Spinach (Ipomoea aquatica)

Water Spinach

Ipomoea aquatica

Crisp trailing stems carry edible leaves, a staple of tropical cuisine. Aquatic herbaceous vine; common names: kangkong, water morning glory.

Full sun
7/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; requires at least 6 hours of direct sunlight for vigorous growth; tolerates bright indirect light for indoor hydroponic setups
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Watering Grows in shallow, still or slow-moving water; maintain a 5–10 cm water depth for rooted plants; change water every 3–5 days to prevent stagnation
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Temperature Thrives in warm tropical temperatures; avoid frost and temperatures below 10°C, which will cause leaf yellowing and stem dieback
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Characteristics

  • Leaf: Arrowhead-shaped, glossy green, 5–15 cm long with smooth margins
  • Flower: Trumpet-shaped, pale lavender to white, 3–5 cm wide with five fused petals
  • Stem: Succulent, hollow, trailing or floating stems that root at nodes
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Care Guide

Watering

Maintain consistent 5–10 cm water depth; top up water as it evaporates

Fertilization

Diluted liquid fertilizer every 2 weeks. Use nitrogen-rich fertilizer to promote leafy growth; avoid over-fertilization to prevent algal blooms

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 before applying to the water substrate; avoid adding raw peels to prevent odor and pest infestations
Pruning
  • Harvest young 10–15 cm stem tips regularly to encourage bushier growth and extend harvest period
  • Remove yellowing or decaying foliage to maintain water quality and prevent disease spread
  • Trim overcrowded stems to improve light penetration and airflow around rooted plants
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA does not list as toxic; no known adverse effects from foliage ingestion

Humans: Edible foliage; raw seeds may cause mild gastrointestinal upset if ingested in large quantities

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Garden Uses & Culture

Culture: Valued in Southeast Asian and Chinese cuisine as a nutrient-dense leafy vegetable

Usage: Edible foliage for stir-fries, soups, and salads; ornamental floating vine for water gardens