Stella de Oro Daylilies are a wonder. This re-blooming daylily plant brightens up the summer days with ruffle-edged, bell-shaped golden flowers. Blooms last only a day or so but they put on a magnificent show and they're highlighted with green, grassy foliage. They are a perfect addition to a perennial bed, or along a path or border. These are a winner for most of the US as these babies thrive in USDA Zones 3-9.