PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates afternoon shade in hot, arid climates to prevent leaf scorch
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot and fungal growth
Temperature
Hardy to USDA zones 3–9; withstands extreme winter cold and moderate summer heat without damage
Characteristics
- Leaf: Opposite, lanceolate, serrated edges; aromatic when crushed
- Flower: Dense terminal heads of tubular lavender-pink blooms; whorled bracts below
- Stem: Square, green, slightly hairy; upright clumping growth habit
Care Guide
Watering
Keep soil consistently moist but not waterlogged; apply mulch to retain soil moisture
Fertilization
Apply a balanced organic top-dressing once at emergence. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over flowering
Banana peel tea：Soak 2–3 chopped banana peels in 4L of water for 24 hours; strain and apply as a root drench to avoid direct leaf contactPruning
- Deadhead spent flower heads to encourage extended blooming and prevent self-seeding
- Cut back foliage to 10 cm above soil after first frost to tidy clumps and support winter dormancy
- Divide overcrowded clumps every 2–3 years in early spring to maintain plant vigor
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no known adverse effects from ingestion or contact
Humans: Non-toxic to humans; aromatic leaves are safe for culinary and herbal use
Garden Uses & Culture
Culture: Associated with Native American medicinal use for treating colds, sore throats, and skin irritations
Usage: Pollinator garden anchor, herbal tea ingredient, cut flower for floral arrangements
