25x Large-flowered gladiolus 'Black Jack' redIt's not something you see often! The large flowered gladiolus 'Black Jack' is very dark red, with black edges. A dark touch that catches the eye in any summer garden. The gladiolus also attracts butterflies. Plant the tubers in the spring. The flowers bloom in the summer. Space the tubers out when planting. The distance between plants is three times the width of the tuber. Plant the tuber the depth of three times the tuber's height. Place the