PlantFun
Plant Needs
Sunlight
Partial sun to full shade; thrives in dappled woodland light and tolerates wet soil conditions
Watering
Keep soil consistently moist throughout the growing season; tolerates temporary flooding
Temperature
Hardy to USDA zone 3; withstands cold winters and warm summer heat without damage
Characteristics
- Leaf: Opposite, lance-shaped, serrated dark green leaves, 7–15 cm long
- Flower: Tubular white (rarely pale pink) two-lipped blooms clustered at stem tips
- Stem: Erect square green to reddish-green stems branching near the top
Care Guide
Watering
Keep soil evenly moist; water deeply during prolonged dry spells
Fertilization
Diluted balanced liquid feed once monthly. Avoid over-fertilizing to prevent leggy growth
Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle 1 tsp per plant around the base and water in to release nutrientsPruning
- Deadhead spent blooms to encourage extended flowering into early fall
- Cut back stems to 10 cm above soil level in late fall or early spring to promote new growth
- Thin overcrowded clumps every 2–3 years to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-verified non-toxic to cats; no known toxic compounds
Humans: Non-toxic to humans; no reported adverse effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Pollinator-friendly ornamental; attracts bees, butterflies, and hummingbirds
