To care for Stella D’Oro daylilies, plant the bulbs where they get full sun, and use well-drained soil that’s been enriched with humus. To encourage the lilies to bloom more often, deadhead the old flowers and remove brown foliage.
To get the best quality blooms and longevity from Stella D’Oro daylilies, plant the roots in holes about 2 inches deep and 1 inch wider than the tuber. Because this variety of lily propagates so quickly, plant them approximately 12 inches apart, then cover them with 2 inches of mulch.
Stella D’Oro lilies are drought tolerant and grow best in hardiness zones 3 through 9. They need well-drained soil, and they don’t require heavy watering except in unseasonably hot weather. To keep the plants blooming all season, cut away the dead blooms and foliage regularly. When cared for properly, they should produce dense clumps of long green leaves and long stems that carry multiple blooms.
To prepare the lilies for winter, trim away all brown and damaged leaves, and re-mulch the bed during the fall. Fall is also a good time to dig up large, dense clumps and divide their root balls for re-planting. Roots can also be rested in a cool, dry place until spring.