PlantFun
Plant Needs
Sunlight
Partial shade to full sun; thrives in wet, open habitats and tolerates occasional direct sunlight
Watering
Keep soil consistently moist; tolerates standing shallow water up to 10 cm deep
Temperature
Hardy to mild frost (down to 0°C); prefers cool to temperate growing conditions
Characteristics
- Leaf: Oval to lanceolate with toothed margins, clasping the square stem at the base
- Flower: Small, dull purple-brown blooms arranged in dense terminal spikes
- Stem: Square, hollow, and hairless, with a rigid upright growth habit
Care Guide
Watering
Maintain consistent soil moisture; top up standing water levels as needed
Fertilization
Apply diluted balanced liquid feed once monthly. Use low-nitrogen feed to promote flowering rather than foliage growth
Banana Peel Compost Tea：Compost banana peels for 2–3 weeks to break down nutrients, dilute 1:20 with water for root drenching; avoid applying raw peels to prevent pest infestationsPruning
- Deadhead spent flower spikes to encourage prolonged blooming and prevent self-seeding
- Cut back stems to ground level in late autumn to promote healthy new growth in spring
- Thin overcrowded stems in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No listed toxicity to cats
Humans: No documented toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Traditional herbal remedy for skin irritations and minor wounds; ornamental wetland plant
