PlantFun
Plant Needs
Sunlight
Thrives in full sun to partial shade; requires at least 6 hours of direct daily sunlight for optimal blooming
Watering
Water deeply when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot
Temperature
Hardy to mild frosts (down to -1℃); prefers daytime temperatures 18–27℃; protect from extreme heat above 32℃
Characteristics
- Leaf: Ovate, serrated, aromatic green leaves with soft, silvery pubescence
- Flower: Dense terminal spikes of tubular indigo-blue flowers with contrasting white lower lips
- Stem: Square, sturdy green to reddish-brown stems characteristic of the mint family
Care Guide
Watering
Keep soil consistently moist but not waterlogged; increase watering frequency during hot, dry spells
Fertilization
Apply diluted balanced liquid fertilizer every 2 weeks. Avoid over-fertilizing, as this can lead to leggy growth and reduced blooming
Banana peel compost tea：Soak fully composted banana peels in water for 3 days; dilute the tea 1:20 with water before applying as a root drench; discard solid peels to avoid attracting pestsPruning
- Deadhead spent flower spikes regularly to encourage continuous blooming throughout the growing season
- Cut back stems by one-third in late winter to promote compact, bushy new growth in spring
- Remove yellowing or damaged foliage to improve airflow and maintain plant appearance
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic; no adverse effects reported from ingestion
Humans: No known toxic effects; leaves may be used in culinary applications in small quantities
Garden Uses & Culture
Culture: Symbolizes wisdom, remembrance, and loyalty; a popular choice for pollinator-friendly wildlife gardens
Usage: Ornamental garden plant; long-lasting cut flower arrangements; attracts bees, butterflies, and hummingbirds
