Stella Dora, more commonly seen as Stella de Oro or Stella d’Oro, is a member of the daylily family. Stella de Oro is noted for multiple yellow-orange blooms on one stem. Each bloom will be open for only one day but because there are so many stems filled with blooms waiting to open, you can see endless color from June into September. Stella de Oro is a perennial and is classified as a diploid, which means it is a smaller variety of daylily, reaching 12 to 16 inches tall. Adaptable to most soil types, Stella de Oro is cold hardy in United States Department of Agriculture (USDA) zones 3 to 9.
Choose a well-drained, full sun to part shade location to plant Stella de Oro daylilies. Container daylilies can be planted anytime, spring to fall.
Dig the hole twice as wide and deep as the container. Back fill the hole halfway. Mix 1 to 2 inches of organic matter, like compost or leaf mold, into the dirt that was returned to the hole. If planting multiple Stella de Oro, plant them 24 inches apart.
Remove the plant from the container and place in the center of the hole. The crow, the point where the stem of the daylily meets the roots, should be about 1 inch below the ground level. Adjust the amount of dirt in the hole if necessary.
Backfill the hole halfway up the rootball and then water around the rootball to settle the dirt. Finish backfilling the hole and water again.
Apply 2 to 3 inches of mulch around the plant, keeping the mulch about 1 inch for the stem. The mulch will help retain moisture and help to retard weed growth.
Water the daylily when you water other plants, or every 7 to 10 days if there is no rainfall.
Cut the dead foliage off the plant in early spring.
Apply 1 to 2 inches of organic matter around the plant in the spring to provide nourishment. An all-purpose commercial flower fertilizer can be used instead of organic matter. Follow the manufacturer’s instructions for application.
Clip-off spent blooms. Blooms left on the plant will create seed pods, which divert the plant’s energies and may result in fewer blooms the following year.