Bulbs Blue Reticulata Dwarf Iris Perennial Miniature Flower Small, extremely early flowering fragrant iris. The flowers of iris reticulata are a brilliant, cobalt blue with yellow markings on the falls. Rock gardens and gravel gardens are ideal planting locations for these bulbs. Also consider fast-draining areas beside a front walk or stone patio. Another option is to grow the bulbs in an elevated alpine trough or in pots.