Sun Exposure: Part shade to shade
Origin: Eastern and southern USA
Growth Habits: Herbaceous perennial, spreading, 6 to 12 inches tall (15-30 cm), 1 to 2 feet spread (30-60 cm); opposite oblong leaves, 2 to 4 inches long (5-10 cm)
Watering Needs: Regular water
Propagation: Cuttings, seeds, self-sows
The genus is named after the 15th century French botanist Jean Ruelle.
Blooming Habits:
Light blue to violet flowers from spring to fall
Culture:
Space plants 18 inches apart (45 cm).
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