Giant Amazon Water Lily (Victoria amazonica)

Giant Amazon Water Lily

Victoria amazonica

Its floating pads hold small children like living rafts, a marvel of aquatic engineering. Aquatic herbaceous perennial; common name: Giant Water Lily.

Full sun
0/week
Challenging
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Plant Needs

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Sunlight Requires unobstructed full direct sunlight for 6–8 hours daily; shaded water surfaces will inhibit pad and flower growth
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Watering Requires permanent, still freshwater; maintain water depth of 1–3 m to accommodate root and pad development
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Temperature Thrives in warm tropical waters; avoid temperatures below 22°C as growth will stall and pads may decay
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Characteristics

  • Leaf: Large circular floating pads with upturned rims; underside has spiny veins for structural support
  • Flower: Night-blooming, white on first night, turning pink/red by second night; emits sweet pineapple-like fragrance
  • Root: Thick, fleshy submerged rhizomes that anchor in muddy lake or pond beds
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Care Guide

Watering

Maintain consistent water level; monitor for excessive algae growth and treat with natural algaecides if needed

Fertilization

Insert slow-release aquatic plant fertilizer tablets into the substrate near rhizomes. Avoid over-fertilization to prevent harmful algal blooms

Composted cow manure pellets:Bury 2–3 pellets 10 cm deep in the substrate near rhizomes; avoid raw manure to prevent water contamination and algae growth
Pruning
  • Remove yellowing or damaged floating pads to maintain water clarity and reduce nutrient competition
  • Thin overcrowded rhizomes in early spring to prevent overcrowding and promote healthy pad growth
  • Trim spent flower heads promptly to redirect energy to root and pad development
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects from ingestion or contact

Humans: No known toxic effects on humans; safe for incidental contact

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Garden Uses & Culture

Culture: Symbolizes natural engineering and tropical biodiversity; featured in major botanical garden exhibits worldwide

Usage: Ornamental aquatic plant for large public ponds; educational tool to demonstrate plant adaptation