PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates mild afternoon shade in hot, arid regions to prevent leaf scorch
Watering
Water deeply when the top 5 cm of soil is dry; avoid overwatering to prevent root rot
Temperature
Hardy to extreme cold (USDA zone 3) and moderate summer heat; withstands light frost without damage
Characteristics
- Leaf: Lance-shaped, medium green, opposite arrangement, slightly serrated margins
- Flower: Tubular, deep purple-black blooms clustered on upright spikes; prominent white stamens (the "beard")
- Stem: Upright, sturdy green stems with minimal branching
Care Guide
Watering
Keep soil consistently moist but not waterlogged during active growth
Fertilization
Light, balanced organic feed once monthly. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over blooms
Banana peel tea：Soak 2-3 chopped banana peels in 4L of water for 3 days; dilute 1:2 with fresh water before drenching soil to avoid nutrient burnPruning
- Deadhead spent flower spikes to encourage extended secondary blooming
- Cut back foliage to ground level in late autumn after frost kills aboveground growth
- Thin overcrowded clumps every 2-3 years 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; no reported toxicity
Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Ornamental garden plant; attracts pollinators including bees and hummingbirds
