PlantFun
Plant Needs
Sunlight
Requires full sun daily for consistent flowering; tolerates partial shade but will produce fewer blooms
Watering
Constantly submerged in 30–100 cm of still or slow-moving water; monitor water quality weekly to prevent stagnation and algae growth
Temperature
Thrives in 15–22°C water; rhizomes can overwinter in sediment during brief frosts in temperate regions
Characteristics
- Leaf: Round floating leaves with a deep basal notch, glossy green upper surface, purplish underside
- Flower: Fragrant white blooms 8–12 cm diameter, with 20–25 petals opening during daytime hours
- Stem: Submerged rhizomatous stems anchored in aquatic sediment
Care Guide
Watering
Maintain stable water level at 30–100 cm; top up weekly to replace evaporation
Fertilization
Insert aquatic fertilizer tablets into sediment every 4 weeks. Avoid over-fertilization to prevent excessive algae growth
Composted eggshell powder：Mix a small amount of finely ground, fully composted eggshell powder into the surrounding sediment in early spring; avoid direct contact with rhizomes to prevent tissue burnPruning
- Remove yellowing or decaying floating leaves regularly to maintain water clarity and reduce debris buildup
- Deadhead spent blooms promptly to encourage additional flowering throughout the growing season
- Trim excess submerged stems in late autumn to minimize organic matter that can decompose and disrupt water quality
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA confirmed toxic; contains alkaloids that cause vomiting, diarrhea, and lethargy
Humans: Ingestion causes mild gastrointestinal distress including nausea and vomiting
Garden Uses & Culture
Culture: Symbolizes purity, tranquility, and spiritual renewal in European folk traditions
Usage: Ornamental water garden plant; historical herbal use of rhizomes was limited due to inherent toxicity
