PlantFun
Plant Needs
Sunlight
Partial sun to full sun; tolerates light shade in hot, arid climates to prevent leaf scorch
Watering
Requires standing water or consistently saturated soil; avoid allowing substrate to dry out completely
Temperature
Hardy to 0°C; prefers cool to temperate temperatures, avoid prolonged exposure to heat above 30°C
Characteristics
- Leaf: Opposite, ovate to lanceolate leaves with serrated margins; bright green, slightly hairy texture
- Flower: Dense terminal whorls of pale lilac to pinkish-purple tubular flowers
- Stem: Square, creeping rhizomes that root at nodes; semi-aquatic growth habit
Care Guide
Watering
Maintain 5–10 cm of standing water around plant roots
Fertilization
Diluted aquatic plant feed once monthly. Use low-nitrogen feed to prevent excessive leaf growth at the expense of flowering
Composted banana peel tea：Fully compost banana peels, steep in water for 3 days, dilute 1:20 before applying to avoid nutrient burn and algae growthPruning
- Trim back spent flower heads to encourage fresh foliage growth
- Thin overcrowded rhizomes in early spring to control spread
- Remove yellowing or damaged leaves to maintain plant health and water clarity
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-verified non-toxic; no adverse effects on cats
Humans: No known toxicity to humans; safe for culinary and herbal use
Garden Uses & Culture
Culture: Used in traditional herbal remedies for digestive relief; symbolizes refreshment and calm
Usage: Culinary herb for teas, salads, and garnishes; ornamental aquatic plant for water features
