PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates mild afternoon shade in hot climates to prevent leaf scorch
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
Temperature
Hardy to -30°C; tolerates summer heat up to 35°C; protect new spring growth from late frost
Characteristics
- Leaf: Opposite, lanceolate leaves with serrated margins; aromatic when crushed
- Flower: Dense terminal spikes of tubular lavender-blue flowers; nectar-rich
- Stem: Square, upright green stems typical of the mint family
Care Guide
Watering
Keep soil consistently moist during active growth periods
Fertilization
Diluted balanced liquid feed once monthly. Avoid over-fertilization to prevent leggy growth
Banana peel compost tea：Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 for root drench; discard solid peels to avoid pest attractionPruning
- Deadhead spent flower spikes to encourage extended blooming
- Cut back stems to 10 cm above soil level in late autumn to prepare for winter
- 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: Non-toxic to cats; no known adverse effects
Humans: Non-toxic to humans; safe for culinary use
Garden Uses & Culture
Culture: N/A
Usage: Culinary herb for teas, garnishes, and flavoring; pollinator-friendly garden plant
