50 PURPLE MAJESTY MILLET (Pearl, Ornamental, or Black Leaf Millet) Ornamental Grass Pennisetum Glaucum Seeds BLOOM TIME: Summer HARDINESS ZONE: 8 - 11 PLANT HEIGHT: 36 - 60" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average - Dry Dark Purple - Nearly Black. Purple Majesty can easily be grown in containers, and the 8-12 inches flower (seed) stalks are an absolute favorite of birds. This is an AAS winning variety whose lovely dark colors can add a great contrast when paired with other plants.