PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates dappled light in hot summer climates to prevent leaf scorch
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid waterlogging to prevent root rot
Temperature
Hardy to -15°C; withstands mild frost and warm summer temperatures up to 30°C
Characteristics
- Leaf: Basal rosette of ovate, softly hairy leaves; stem leaves smaller, lanceolate
- Flower: Dense terminal spikes of violet-blue, bilabiate flowers; bracts purple-tinged
- Stem: Square, hairy stems typical of the mint family
Care Guide
Watering
Keep soil consistently moist but not soggy; apply mulch to retain soil moisture
Fertilization
Apply diluted balanced liquid feed once monthly. Use low-nitrogen feed to prioritize flower production over foliage growth
Composted banana peel tea：Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations and odorPruning
- Deadhead spent flower spikes to encourage secondary blooming and extend the flowering season
- Cut back foliage to ground level in late autumn to prepare for winter dormancy
- Thin overcrowded clumps in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no harmful compounds identified
Humans: Non-toxic to humans; no documented adverse effects from ingestion or contact
Garden Uses & Culture
Culture: Symbolizes wisdom and remembrance in traditional European folklore
Usage: Ornamental garden plant; attracts pollinators including bees and butterflies
