Dwarf Crested Iris Common Name: Dwarf Crested Iris Botanical Name: Iris cristata Dwarf Crested Iris Plant family: Iridaceae Location: Art Trail, Tulip Tree Trail Growing zone: 4-9 Height: 4-8 in. Spread: 10-12 in. Bloom time: June, July Bloom description: Violet-blue to pale-blue flowers with crested sepals that grow close to the ground. Leaf type: Broad, arching leaves hug the ground to form a mass of light green. Garden uses: A great plant to use as a formal border or to naturalize in a woodland garden. Rich woodlands with part sun or shade and moist soil produce strong colonies. Dwarf Crested Iris can also be used as a native groundcover.