PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates coastal salt exposure and dry, nutrient-poor soils
Watering
Allow soil to dry completely between waterings; highly drought-tolerant once established
Temperature
Hardy to -15°C; withstands cool coastal summers and mild winter frosts
Characteristics
- Leaf: Basal rosette of narrow, linear to lanceolate leaves with slightly rough margins
- Flower: Compact, spherical blue flower heads (1–2 cm diameter) on slender, branching stems
- Stem: Slender, upright, slightly hairy stems with few small, alternate leaves
Care Guide
Watering
Water occasionally during prolonged dry spells; avoid overwatering
Fertilization
Optional diluted feed once monthly if soil is extremely poor. Over-fertilization can reduce flowering and promote leggy growth
Eggshell powder topdressing：Crush clean, dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels without overfeedingPruning
- Deadhead spent flower heads regularly to encourage prolonged blooming
- Trim back faded stems to ground level in late autumn to tidy clumps
- Thin overcrowded clumps every 2–3 years to improve airflow and prevent overcrowding
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats
Humans: No known toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental wildflower; nectar source for bees, butterflies, and other pollinators
