PlantFun
Plant Needs
Sunlight
Full to partial sun; tolerates wet soil and occasional flooding for short periods
Watering
Keep soil consistently moist, especially in growing season; suitable for rain gardens or pond edges
Temperature
Hardy to -30°C; withstands hot, humid summers without significant stress
Characteristics
- Leaf: Opposite or whorled, elliptical to lanceolate; glossy green, 7–15 cm long
- Flower: Spherical, creamy-white inflorescences (button-like) with long, protruding stamens
- Stem: Smooth, light brown to gray; upright, branching habit
Care Guide
Watering
Maintain consistent soil moisture; water deeply during extended dry spells
Fertilization
Apply balanced slow-release fertilizer once at bud break. Avoid over-fertilizing, as excess nutrients can reduce flower production
Eggshell powder top-dressing：Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around the plant base in early spring; water lightly to release nutrientsPruning
- Prune in late winter to early spring to remove dead, damaged, or crossing branches
- Thin dense growth to improve air circulation and promote better flowering
- Shape to maintain desired size; avoid heavy pruning as it can reduce bloom production
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-confirmed non-toxic; no risk of poisoning for cats
Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Ornamental wetland plant; attracts bees, butterflies, and hummingbirds; provides food and shelter for wildlife
