PlantFun
Plant Needs
Sunlight
Requires 6–8 hours of direct sunlight daily for optimal blooming; tolerate partial afternoon shade in hot summer climates
Watering
Water deeply when the top 2–3 cm of soil dries out; avoid overwatering to prevent root rot and fungal growth
Temperature
Hardy to -10°C; protect from extreme heat above 30°C to prevent wilting and reduced bloom production
Characteristics
- Leaf: Deeply lobed palmate green leaves with serrated margins
- Flower: Dense spikes of star-shaped blooms in jewel tones (blue, purple, pink, white)
- Stem: Erect, sturdy green stems with fine, soft pubescence
Care Guide
Watering
Keep soil consistently moist but not waterlogged; apply mulch to retain soil moisture
Fertilization
Apply balanced slow-release fertilizer at planting. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over blooms
Composted eggshell powder：Mix 1 tablespoon of fully crushed, composted eggshells into the top 5 cm of soil in early spring to boost calcium levels without burning rootsPruning
- Deadhead spent flower spikes to encourage secondary blooming through mid-summer
- Cut back stems to basal foliage after the final bloom cycle to promote healthy regrowth the following year
- Remove damaged or diseased foliage promptly to improve airflow and reduce disease risk
- Stake tall stems early in the growing season to prevent lodging in windy conditions
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA classified as toxic; ingestion may cause vomiting, diarrhea, muscle weakness, and seizures
Humans: Contains alkaloids; ingestion causes nausea, vomiting, abdominal pain, and dizziness in humans
Garden Uses & Culture
Culture: Symbolizes an open heart and ardent romantic attachment in floral language
Usage: Ornamental garden border plant, cut flower for floral arrangements
