PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in the bright, open conditions of wetland edges
Watering
Keep soil consistently moist; tolerates temporary standing water typical of natural wetland habitats
Temperature
Hardy to USDA zones 3–8; withstands cold winter dormancy and warm summer heat
Characteristics
- Leaf: Opposite, lanceolate to ovate leaves with serrated margins; medium green, smooth texture
- Flower: Tubular, two-lipped purple flowers with yellow throats; clustered in terminal spikes
- Stem: Square, upright stems with fine hairs; branching near the top
Care Guide
Watering
Maintain consistent soil moisture; water deeply during extended dry spells
Fertilization
Diluted balanced liquid feed once monthly. Avoid over-fertilization to prevent excessive foliage growth at the expense of flowers
Banana peel compost tea：Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to avoid nutrient burnPruning
- Deadhead spent flower spikes to encourage extended blooming through late summer
- Cut back stems to ground level in late autumn after foliage dies back
- 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 health effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Ornamental for wetland gardens; attracts native pollinators including bees and butterflies
