PlantFun
Plant Needs
Sunlight
Prefers partial sun to full shade; tolerates dappled woodland light and avoids intense midday summer sun
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid waterlogging to prevent root rot
Temperature
Hardy to -15°C; thrives in cool temperate conditions and struggles with extreme heat above 28°C
Characteristics
- Leaf: Opposite ovate to lanceolate leaves with serrated margins, hairy texture, and purple-tinged undersides
- Flower: Dense terminal spikes of tubular purple-pink flowers clustered in whorls
- Stem: Square, hairy green to reddish stems characteristic of the mint family
Care Guide
Watering
Keep soil consistently moist but not waterlogged
Fertilization
Light organic feed once monthly. Avoid over-fertilization, as excessive nutrients can reduce flowering and promote leggy growth
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench and discard solids to prevent pest infestationsPruning
- Deadhead spent flower spikes to encourage prolonged blooming through late summer
- Cut back foliage to ground level in late autumn to tidy growth and prepare for winter dormancy
- Thin overcrowded clumps 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 to humans
Garden Uses & Culture
Culture: N/A
Usage: Traditional folk medicine for wound healing; pollinator-friendly wildflower for native gardens
