PlantFun
Plant Needs
Sunlight
Full sun to partial shade; prefers morning sun with afternoon shade in hot summer climates to prevent wilting
Watering
Water deeply when the top 5 cm of soil feels dry; avoid overwatering to prevent root rot
Temperature
Cold hardy to -15°C; protect from extreme heat above 28°C to prevent spike wilting
Characteristics
- Leaf: Palmate, deeply lobed dark green foliage with rough texture
- Flower: Dense vertical spikes of single or double blooms in blue, purple, pink, or white
- Stem: Erect, sturdy green stems covered in fine, soft hairs
Care Guide
Watering
Keep soil consistently moist but not waterlogged; mulch to retain moisture
Fertilization
Apply balanced granular fertilizer at planting. Avoid high-nitrogen fertilizers to prevent leggy, weak stems
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to avoid nutrient burnPruning
- Deadhead spent blooms promptly to encourage secondary flowering
- Cut back stems to ground level after the first autumn frost to prepare for winter dormancy
- Thin crowded shoots in early spring to improve airflow and reduce fungal disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; ingestion can lead to severe gastrointestinal and neurological symptoms
Humans: Contains toxic alkaloids; ingestion may cause nausea, dizziness, or irregular heartbeat in large quantities
Garden Uses & Culture
Culture: Symbolizes an open heart and ardent romantic attachment in floral language
Usage: Cut flower for formal floral arrangements; tall border plant for cottage gardens
