5 BAT FLOWER (Cats Whiskers / Devil Flower) Tacca Chantrieri Flower Seeds BLOOM TIME: Summer - Black 12 inches wide flowers! HARDINESS ZONE: 10 - 11 PLANT HEIGHT: 24 - 36" . . . PLANT SPACING: 36 - 48" LIGHT REQUIREMENTS: Light Shade . . . SOIL/WATER: Average As mentioned above, these stunning black bat shaped flowers reach 12 inches wide! The whiskers that hang down from them can grow to 28 inches long! They are a stunning tropical flower like no other!