PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in intense summer heat and bright sunlight with minimal scorching risk
Watering
Allow top 5–7 cm of soil to dry completely between waterings; highly drought-tolerant once established
Temperature
Hardy to -10°C; withstands high summer temperatures up to 38°C; avoid prolonged frost exposure for young plants
Characteristics
- Leaf: Oval to lanceolate gray-green leaves with fuzzy, silvery undersides
- Flower: Dense spikes of tubular deep blue blooms with subtle white accents
- Stem: Woody, branching stems with rough gray-brown bark
Care Guide
Watering
Water deeply once weekly; reduce frequency during heavy rainfall to avoid root rot
Fertilization
Apply diluted balanced fertilizer once monthly to support bloom production. Use low-nitrogen fertilizer to prioritize flower development over foliage growth
Banana peel tea：Soak dried banana peels in water for 24 hours; dilute 1:20 with water before applying as a root drench; avoid direct application to foliagePruning
- Remove spent flower spikes immediately after blooming to encourage secondary flowering cycles
- Thin overcrowded branches in late winter to improve airflow and light penetration
- Shape the shrub in early spring to maintain a compact, upright growth form
- Trim dead or damaged stems throughout the growing season to promote healthy new growth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no identified toxic compounds
Humans: Non-toxic to humans; no reported adverse effects from ingestion or skin contact
Garden Uses & Culture
Culture: Associated with wisdom and purification in traditional North American herbal practices
Usage: Ornamental garden plant; attracts bees, butterflies, and hummingbirds; used in xeriscape and native plant landscaping
