PlantFun
Plant Needs
Sunlight
Requires moderate submerged sunlight; tolerates partial shade in shallow, sheltered ponds
Watering
Requires permanent submersion in clean, freshwater; avoid stagnant, nutrient-polluted water to prevent algal competition
Temperature
Tolerates cool to temperate freshwater; avoid prolonged temperatures above 25°C which may cause leaf dieback
Characteristics
- Leaf: Submerged, oval to lanceolate leaves clasp the stem fully (perfoliate), bright green, 2–8 cm long
- Flower: Tiny greenish-brown spikelets emerging 2–5 cm above water surface
- Stem: Slender, branching, flexible submerged stems with fine rootlets
Care Guide
Watering
Maintain consistent water level; ensure adequate aeration to prevent stagnation
Fertilization
Diluted aquatic plant fertilizer once monthly. Use low-nitrogen aquatic fertilizer to avoid triggering harmful algal blooms
Composted eggshell powder：Mix a small amount of finely ground, composted eggshells into planting sediment during initial installation; avoid overapplication to prevent nutrient runoffPruning
- Trim excessive stem growth in mid-summer to prevent overcrowding of pond surfaces
- Remove yellowing or decaying leaves to maintain water quality
- Thin dense root clumps in early spring to promote new, healthy growth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No toxicity to cats
Humans: No documented toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Aquatic habitat for small pond invertebrates; ornamental water garden plant
