Answer: The normal bloom time for Asiatic lilies is spring through early summer. Sounds as though your plants have finished blooming and are ready for a rest. Cut off the spent flowering stem and begin withholding water so the leaves will dry up. After a resting period you should see new leaves emerging. When that happens, begin watering regularly again. After your plants have been in the flower box for about a year they will begin responding to the normal light levels and temperatures they're experiencing and should bloom right on schedule.
Best wishes with your garden!
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