PlantFun
Plant Needs
Sunlight
Thrives in full sun to partial shade; tolerates dappled light over shallow water
Watering
Requires consistent shallow water coverage (10–30 cm depth); replenish water levels as needed to maintain submersion of rootstock
Temperature
Tolerates cool to temperate temperatures; dormant rhizomes can survive mild frost
Characteristics
- Leaf: Linear, sword-shaped, triangular cross-section, bright green, up to 1 m long
- Flower: Pink to pale purple, star-shaped, arranged in dense terminal umbels
- Stem: Erect, fleshy, hollow, arising from rhizomatous rootstock
Care Guide
Watering
Maintain steady 10–30 cm water depth; top up during dry spells
Fertilization
Diluted aquatic plant feed applied once monthly. Avoid over-fertilization to prevent algal blooms in surrounding water
Composted banana peel tea：Fully compost banana peels, steep in water for 3 days, dilute 1:20 with pond water, and apply directly to the aquatic substrate to avoid water contaminationPruning
- Remove spent flower heads to limit unwanted self-seeding in sensitive ecosystems
- Trim yellowing or damaged leaves to maintain a tidy appearance and improve water circulation
- Thin overcrowded rhizomes in early spring to reduce competition for nutrients and light
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats
Humans: No documented toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental pond plant; provides shelter and foraging habitat for aquatic insects and small wildlife
