When the growing season ends and you must close the door on another satisfying summer, instead of yearning for the next growing season, bring a bit of it indoors with you to keep you busy during the winter. Many plants that fill a growing area outdoors can also thrive in an indoor environment---even plants that might surprise you. Grow daylilies inside during the winter in a sunny spot to have plants with lush foliage and bright blossoms.
Fill the planting container approximately two-thirds full with potting soil.
Place the daylily plant into the container over the potting soil, spreading the roots within the container gently. Fill the container with additional potting soil so the crown of the daylily is 1 inch below the surface of the potting soil. Tamp the soil down firmly with your hands and water the daylily to saturate the soil evenly.
Place the container in a location where the daylily will receive at least six hours of direct sunlight each day. A southern or western exposure window would be ideal.
Provide regular water for the daylily plant, watering when the top inch of soil dries. Pour enough water over the soil to saturate it completely.
Fertilize the daylily once over the winter approximately one month after planting it. Mix the fertilizer with water according to package recommendations for the size of the daylily and pour the fertilizer carefully over the potting soil. Do not allow the fertilizer to splash onto the plant foliage.
Simulate an outdoor environment with temperature, if possible. Strive for daytime temperatures between 75 and 80 F and nighttime temperatures between 60 and 65 F.
Clip off blossoms with the pruning shears as they fade to keep the daylily producing blossoms and to keep the plant attractive. Clip off any leaves that yellow also to maintain the plant's attractive appearance.
Allow the plant to die back after it finishes blossoming. Continue watering it in the same pattern, but expect the foliage to begin to fade and yellow eventually. You can cut the plant back to just above the soil level when the foliage yellows and allow the plant to enter dormancy, if you wish. Move the plant to a cooler location (45 F) for three to four months, watering approximately once per month, and after the plant rests it should be ready to resume an active growth cycle.