PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in open, sunny wetland habitats; tolerates afternoon shade in hot temperate regions
Watering
Prefers consistently moist to wet soil; tolerates short periods of standing water
Temperature
Extremely cold-hardy; withstands summer heat up to 35°C in well-watered conditions
Characteristics
- Leaf: Narrow lanceolate leaves arranged in whorls of 3–4, dark green with smooth margins
- Flower: Dense terminal spikes of tiny magenta-purple flowers with six petals each
- Stem: Erect, angular green stems branching near the upper portion
Care Guide
Watering
Keep soil consistently moist; avoid drying out during peak growth
Fertilization
Diluted balanced liquid feed once monthly. Avoid over-fertilization to prevent excessive foliage growth at the expense of flowering
Banana peel compost tea：Compost banana peels for 2 weeks, steep in water for 48 hours, dilute 1:20 for root drench to support flower productionPruning
- Cut back spent flower spikes to encourage extended blooming
- Trim dead or damaged stems to ground level in late winter to promote new spring growth
- Thin overcrowded stems in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats
Humans: No known toxic effects on humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental wetland plant; historically used in herbal medicine as an astringent
