PlantFun
Plant Needs
Sunlight
Partial shade to full sun; prefers dappled light in hot climates to prevent leaf scorch
Watering
Keep soil consistently moist; tolerates occasional shallow standing water in naturally damp habitats
Temperature
Hardy to USDA zone 5; withstands light frost; avoid prolonged extreme heat above 30°C
Characteristics
- Leaf: Compound, sharply serrated leaflets with a distinct aromatic scent when crushed
- Flower: Flat-topped umbels of tiny white or pale greenish-white clustered blooms
- Stem: Hollow, grooved smooth green stems with subtle purplish tinges near the base
Care Guide
Watering
Maintain consistent soil moisture; water deeply 2–3 times weekly during active growth
Fertilization
Apply diluted organic feed once monthly to support foliage growth. Use nitrogen-rich organic feeds to promote lush, aromatic foliage
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute the mixture 1:20 for root drenching to support healthy leaf developmentPruning
- Deadhead spent flower heads to prevent unwanted self-seeding in managed gardens
- Remove yellowing lower leaves to improve airflow and reduce disease risk
- Cut back the entire plant to ground level after flowering completes its biennial growth cycle
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA does not list this species as toxic to cats
Humans: No documented toxic effects for humans when used appropriately
Garden Uses & Culture
Culture: N/A
Usage: Aromatic foliage used in traditional Western North American herbal remedies; ornamental for native wildflower gardens
