Salvia uliginosa

Salvia uliginosa features delicate sky blue flowers that stand out vividly against its lush mid-green foliage, creating a striking contrast that enhances any garden setting. This hardy perennial thrives in moist conditions and spreads steadily through underground runners (if you don't want it getting too big consider growing it in dryer conditions), allowing it to form attractive, natural-looking clumps over time.