PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates short periods of direct spring sun, avoid intense midday summer sun
Watering
Water when top 2 cm of soil dries; avoid overwatering to prevent root rot in heavy soil
Temperature
Hardy to -15°C; prefers cool spring temperatures, tolerates mild summer heat without prolonged exposure
Characteristics
- Leaf: Small, oval to lanceolate, opposite arrangement, slightly hairy margins
- Flower: Tiny, 4-petaled blue to pale violet blooms in terminal racemes
- Stem: Slender, creeping to ascending, green to reddish-brown
Care Guide
Watering
Keep soil evenly moist during bloom period to support flower production
Fertilization
Light, diluted balanced feed once monthly. Avoid high-nitrogen fertilizers to prevent excessive foliage growth over flowering
Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels and improve soil drainage without burning rootsPruning
- Deadhead spent blooms promptly to extend the flowering period
- Trim back overgrown stems in late summer to maintain a compact mat form
- Remove damaged or yellowed foliage in early spring to encourage new growth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no reported toxic reactions
Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact
Garden Uses & Culture
Culture: N/A
Usage: Groundcover for rock gardens, border edges; pollinator-friendly for native bees and butterflies
