PlantFun
Plant Needs
Sunlight
Bright partial sun; tolerates full sun in cool climates, but requires afternoon shade in hot, arid regions to prevent leaf scorch
Watering
Keep soil consistently moist but not waterlogged; avoid allowing the root zone to dry out completely during active growth
Temperature
Hardy to -15°C; thrives at 18–24°C; protect from extreme heat above 30°C to prevent wilting
Characteristics
- Leaf: Opposite, ovate to lanceolate leaves with serrated margins; dark green, glossy, and highly aromatic when crushed
- Flower: Dense terminal spikes of small purple to pale pink tubular flowers
- Stem: Square, green to purplish stems; underground rhizomes enable rapid vegetative spread
Care Guide
Watering
Keep soil evenly moist; water when the top 1 cm of soil feels dry
Fertilization
Feed with diluted balanced liquid fertilizer every 2 weeks. Avoid over-fertilizing, as this can lead to leggy growth and reduced aromatic oil content
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute the mixture 1:20 before applying as a root drench to support healthy foliage growthPruning
- Pinch back young stem tips to encourage bushier, more compact growth
- Harvest leaves regularly to prevent premature flowering and maintain strong aromatic flavor
- Cut back plants to 5 cm above soil level in late autumn to promote vigorous new growth in spring
- Remove yellowing or damaged foliage to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; contains essential oils that may cause vomiting, diarrhea, lethargy, or muscle tremors
Humans: Large ingestion may cause mild gastrointestinal upset; undiluted essential oil can irritate skin or cause toxicity if ingested
Garden Uses & Culture
Culture: Symbolizes hospitality and refreshment; historically used in traditional medicine to aid digestion and relieve headaches
Usage: Culinary flavoring for teas, desserts, and savory dishes; diluted essential oil for aromatherapy and topical pain relief
