PlantFun
Plant Needs
Sunlight
Prefers full to partial sun; tolerates moderate shade in shallow, calm water
Watering
Requires continuous submersion in 5–20 cm of freshwater; no scheduled watering needed
Temperature
Tolerates freezing temperatures as submerged rhizomes; avoid prolonged exposure above 28°C
Characteristics
- Leaf: Whorls of 6–12 linear, bright green submerged leaves; shorter, stiffer emergent leaves
- Flower: Tiny, greenish-white, inconspicuous flowers in axils of upper leaves
- Stem: Slender, branching, hollow aquatic stems that root at nodes
Care Guide
Watering
Maintain consistent 5–20 cm water depth
Fertilization
Diluted aquatic plant fertilizer once monthly. Use low-nitrogen aquatic feed to avoid excessive algal blooms
Composted eggshell powder：Crush fully composted eggshells and mix a small amount into aquatic substrate to boost calcium levels without water pollutionPruning
- Thin overcrowded submerged stems to improve water circulation and light penetration
- Remove dead emergent shoots in autumn to prevent decay and nutrient buildup
- Trim spreading rhizomes every 2–3 years to control growth in contained water features
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No known toxicity to cats
Humans: No known toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Aquatic habitat restoration; ornamental pond plant; erosion control in shallow wetlands
