50 PURPLE OREGON IRIS (Tough-Leaf Iris) Iris Tenax Flower Seeds BLOOM TIME: Early Spring HARDINESS ZONE: 7 - 10 PLANT HEIGHT: 6 - 12" . . . PLANT SPACING: 9 - 15" LIGHT REQUIREMENTS: Part Shade . . . SOIL / WATER: Dry The Oregon Iris has grass-like leaves and lovely decorated colorful flower petals.