PlantFun
Plant Needs
Sunlight
Full sun exposure for optimal blooming; tolerates partial shade in hot, arid regions
Watering
Allow soil to dry completely between waterings; highly drought-tolerant once established
Temperature
Thrives in 15–25°C; tolerates light frost down to 5°C but may suffer damage below 0°C
Characteristics
- Leaf: Narrow, linear, gray-green leaves arranged in whorls along woody stems
- Flower: Five-petaled sky-blue blooms (2–3 cm diameter) that open in morning sunlight
- Stem: Woody, branching stems covered in fine silvery pubescence
Care Guide
Watering
Water deeply once weekly during active growth; avoid waterlogging
Fertilization
Diluted balanced liquid feed once monthly. Avoid high-nitrogen fertilizers which can reduce blooming
Eggshell powder top-dress：Crush dried, rinsed eggshells into fine powder; sprinkle lightly on soil surface and water in to release calcium graduallyPruning
- Remove spent flower stems promptly to encourage repeat blooming through early summer
- Trim back leggy or overgrown stems in early spring to maintain a compact, rounded habit
- Remove dead or damaged wood in late winter to improve airflow and plant health
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No recorded toxicity to cats; safe for feline exposure
Humans: No known toxicity to humans; safe for handling and small-scale consumption
Garden Uses & Culture
Culture: N/A
Usage: Ornamental garden plant for rock gardens, borders, and xeriscaping
