PlantFun
Plant Needs
Sunlight
Partial sun to full sun; tolerates damp, shaded marsh edges and mild shade
Watering
Keep soil consistently moist; tolerant of standing shallow water typical of wetland habitats
Temperature
Hardy to cold temperate climates; withstands mild frost and summer heat up to 28°C
Characteristics
- Leaf: Opposite, lanceolate to ovate leaves with serrated margins; dark green, slightly hairy texture
- Flower: Dense terminal spikes of tubular purple to pinkish-purple bilabiate blooms
- Stem: Square, hairy stems characteristic of the mint family
Care Guide
Watering
Maintain consistently moist soil; supplement with water during prolonged dry spells
Fertilization
Apply diluted organic feed once monthly. Use nutrient-balanced organic feed to support flower production without over-fertilizing
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; avoid raw peels to prevent pest infestationsPruning
- Deadhead spent flower spikes to encourage extended blooming
- Cut back stems to ground level in late autumn to promote healthy spring regrowth
- Thin overcrowded clumps every 2–3 years 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 for humans
Garden Uses & Culture
Culture: N/A
Usage: Traditional medicinal use for minor wound care; pollinator-friendly wildflower for native gardens
