Oriental lilies are a popular lily type that produce a 10-inch bloom with an intense fragrance. The bulbs are planted in the spring or fall and bloom in the summer months, depending on the variety. Removing spent blooms, or deadheading, during the flowering period allows the plant to focus energy on opening new blooms instead of producing seeds.
Remove blooms from the lily plant once they have faded. Break each spent bloom from the plant by gently snapping it off with your hands.
Allow the foliage and stems of the lily plant to continue growing until fall as they are supplying energy to the bulb for winter storage.
Remove plant foliage and stems once they have turned yellow and brown in color by cutting them at ground level.
Discard cut stems and foliage by throwing them in the trash or burying deep underground. Do not place them in a compost pile as the stems can carry the Botrytis fungus.
Apply 1 to 2 inches of rotted manure or compost over the bulbs once the ground begins to freeze. This will reduce spring weed growth and fertilize the bulbs.