The Stella daylily, or Hemerocallis 'Stella De Oro,' was the first of the continuous-blooming daylilies to come on the market. According to a 2002 article about daylily hybridizers by Elisabeth Ginsburg in "The New York Times," Walter Jablonski, a hybridizer from Indiana, registered 'Stella de Oro' with the American Horticultural Society in 1975 and changed the way the gardening world viewed the daylily. Due to its potential for blooming from spring to fall, along with its toughness, this gold daylily has been used from backyards to traffic medians. With a little care, the Stella daylilies in your garden will live up to their reputation.
Choose a site for your Stellas that has at least six hours of sun.
Plant Stellas where the soil is well-drained. Amend with top soil, humus and organic material such as compost. A daylily will tolerate poor soil, according to Olallie Daylily Gardens, but a good soil makes the difference in the plant's overall performance.
Dig a hole 6 to 8 inches deep, according to advice from Olallie Daylily Gardens, and place the plant so that the crown (just above where the roots begin) is no more than 1 inch below the surface. Fill in around the plant, and leave a slight indentation around the plant to catch water.
Water, according to Olallie Daylily Gardens, is what makes a daylily have more flowers and bloom longer. Make sure your Stella daylilies get enough water, especially after planting.
Fertilize in spring with a high phosphorous, low-nitrogen fertilizer, according to John Arbogast in his advice column for the "The Roanoke Times."
Remove blossoms after they've gone by (they only last one day) to prevent seeds from forming. John Arbogast says this is key to keeping the Stella in color. Seed pods mean less flowers.
Divide Stellas when needed. Lift a clump, getting as many of the roots as possible, and remove loose soil. Separate the roots gently into sizable clumps. Olallie Daylily Gardens recommends using a weeding fork first, then gently tugging roots apart with your hands. Cut leaves down to about 6 inches. Replant as in Step 3.
Leave the brown foliage on the plant at the end of the season for winter protection.