PlantFun
Plant Needs
Sunlight
Full sun for maximum flowering; tolerates partial shade in hot, arid regions to prevent leaf scorch
Watering
Allow the top 2–3 cm of soil to dry completely between waterings; avoid waterlogged conditions
Temperature
Extremely cold-hardy; tolerates summer heat with consistent soil moisture
Characteristics
- Leaf: Oval, toothed gray-green foliage; aromatic when crushed
- Flower: Dense terminal spikes of tubular steel-blue blooms
- Stem: Upright, square, finely hairy stems
Care Guide
Watering
Water regularly during prolonged dry spells to maintain consistent soil moisture
Fertilization
Apply diluted balanced liquid feed once monthly. Discontinue fertilization in late summer to prepare plants for dormancy
Banana peel tea：Steep 2–3 chopped banana peels in 4 liters of water for 3 days; strain and use to drench soil to support flowering and root healthPruning
- Deadhead spent flower spikes promptly to encourage continuous reblooming through late summer
- Cut back all foliage to basal growth in late autumn to tidy plants and promote healthy spring regrowth
- Thin overcrowded clumps every 2–3 years in early spring to improve air circulation and vigor
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA-verified non-toxic to cats; no reported toxicity
Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Ornamental border plant; cut flower for floral arrangements; pollinator-friendly nectar source
