Giant Aponogeton (Aponogeton ulvaceus)

Giant Aponogeton

Aponogeton ulvaceus

Lush submerged foliage creates underwater green clouds. Aquatic perennial herb; common name: Giant Aponogeton.

Partial sun
N/A/week
Moderate
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Plant Needs

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Sunlight Moderate to bright indirect light; avoid direct sunlight to prevent excessive algae growth in aquatic environments
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Watering Requires consistent freshwater; perform 20% partial water changes weekly to maintain water quality and nutrient balance
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Temperature Thrives in warm tropical freshwater; avoid temperatures below 15°C to prevent dormancy or stress
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Characteristics

  • Leaf: Submerged ribbon-like bright green leaves up to 1 m long; oval floating leaves may develop in shallow water
  • Flower: Fragrant emergent white or pale pink spathes with vanilla-like scent
  • Root: Thick tuberous rhizome for nutrient storage and seasonal dormancy
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Care Guide

Watering

Maintain stable water level; weekly 20% partial water changes

Fertilization

Diluted aquatic fertilizer every 2 weeks. Target iron and potassium-rich fertilizers to support foliage growth

Banana peel liquid fertilizer:Soak dried banana peels in dechlorinated water for 3 days, filter solids, dilute 1:50 before adding to aquarium to avoid nutrient spikes
Pruning
  • Trim yellowing or damaged submerged leaves to maintain water clarity and prevent decay
  • Remove spent emergent flowers to avoid organic waste accumulation in water
  • Thin overcrowded foliage to improve water circulation and light penetration for lower leaves
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No recorded toxicity to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Aquatic ornamental plant; adds vertical greenery and fragrant emergent blooms to freshwater aquariums