Week 4 - Continuing National Perennial Month with Stella D'Oro Daylily, the #1 Daylily in the country. This beautiful yellow flowered perennial is all the rage for gardeners everywhere. Stella D'oro blooms once during late spring and then again in late August and into fall. It attracts butterflies as well as other necessary and vital pollinators. This perennial is very easy to grow and great for containers and other small spaces at only 16" tall and 18" wide at maturity. Stella D'Oro is resilient, ranging in zones from 2 to 9 and handling full sun to part shade. You can't go wrong planting this shining star in your garden!