PlantFun
Plant Needs
Sunlight
Full sun to partial shade; thrives in open grassland conditions with minimal shade
Watering
Water regularly during dry spells; avoid waterlogging as roots are sensitive to saturated soil
Temperature
Hardy to subzero winter temperatures; tolerates cool summer climates up to 25°C
Characteristics
- Leaf: Opposite, linear to lanceolate, smooth-edged, dark green foliage
- Flower: Star-shaped, bright blue to purple-blue, clustered at stem apices
- Stem: Slender, erect, unbranched or sparsely branched
Care Guide
Watering
Keep soil evenly moist during active growth; avoid overwatering to prevent root rot
Fertilization
Light feed with diluted organic fertilizer once in early spring. Use low-nitrogen feed to prioritize bloom production over foliage growth
Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels and improve soil structurePruning
- Deadhead spent blooms to extend the flowering period by encouraging new bud formation
- Trim back faded stems to ground level in late autumn to tidy the planting area
- Remove damaged or yellowing foliage promptly to prevent fungal disease spread
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: No listed toxicity to cats
Humans: No known toxicity to humans
Garden Uses & Culture
Culture: N/A
Usage: Ornamental wildflower for rock gardens and meadows; traditional mild digestive aid in folk medicine
