100 WILD PURPLE PETUNIA (Fringeleaf) Ruellia Humilis Flower Seeds BLOOM TIME: Summer HARDINESS ZONE: 3 - 9 PLANT HEIGHT: 12 - 24" . . . PLANT SPACING: 12 - 15" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average - Dry Attracts bees, butterflies, and birds. It's great to have a perennial petunia!