PlantFun
Plant Needs
Sunlight
Partial to full sun; tolerates light shade in hot summer climates to prevent leaf scorch
Watering
Keep soil consistently moist or submerged up to 10 cm; avoid allowing root zone to dry out completely
Temperature
Frost-hardy; thrives in cool temperate conditions; avoid prolonged heat above 28°C
Characteristics
- Leaf: Lanceolate to oblong, smooth-edged, bright green, arranged alternately on slender stems
- Flower: Tiny sky-blue five-petaled blooms clustered in curved scorpioid cymes
- Stem: Slender, branching, hollow internodes adapted for semi-aquatic growth
Care Guide
Watering
Maintain constant moisture or shallow submersion to support active growth and flowering
Fertilization
Diluted balanced liquid feed every 2 weeks. Use low-nitrogen feed to prioritize bloom production over foliage growth
Banana peel compost tea：Compost banana peels for 2 weeks, steep in water, dilute 1:20 for root drench; avoid applying directly to foliagePruning
- Deadhead spent blooms regularly to extend the flowering period
- Trim back faded foliage in late autumn to tidy growth and encourage spring regrowth
- Thin overcrowded clumps in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA confirmed non-toxic; no harmful effects for cats
Humans: Non-toxic to humans; no known adverse effects from ingestion or contact
Garden Uses & Culture
Culture: Symbolizes remembrance and loyal love in European folk traditions
Usage: Ornamental water garden plant; attracts pollinators including bees and butterflies
