PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates light afternoon shade in hot summer climates to prevent leaf scorch
Watering
Water deeply when top 2–3 cm of soil is dry; avoid overwatering to prevent root rot and fungal growth
Temperature
Extremely cold-hardy; tolerates winter temperatures as low as -30°C; withstands summer heat up to 28°C before showing stress
Characteristics
- Leaf: Lance-shaped, serrated margins, medium green, arranged alternately on stems
- Flower: Four-petaled, clustered racemes; colors include purple, pink, white; fragrant especially in evening
- Stem: Erect, branched, slightly hairy
Care Guide
Watering
Keep soil consistently moist during active growth and flowering periods
Fertilization
Apply diluted balanced fertilizer every 2 weeks during active growth. Discontinue fertilization in late autumn to prepare plants for dormancy
Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle 1 teaspoon per plant around the base; gently work into topsoil to boost soil calcium levels without introducing odor or pestsPruning
- Deadhead spent flower clusters promptly to encourage extended blooming and prevent self-seeding if desired
- Cut back stems to ground level after flowering to promote healthy regrowth the following season
- Thin overcrowded seedlings 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 documented health risks
Humans: Non-toxic to humans; no known adverse effects from ingestion or contact
Garden Uses & Culture
Culture: Symbolizes remembrance and devotion in some European folk gardening traditions
Usage: Ornamental garden plant; attracts pollinators including bees, butterflies, and moths
