If it doesn't, don't be alarmed. They may be storing energy and reward the patient gardener with blooms next summer. The normal bloom time for Easter lilies is mid-summer. Let green foliage die back naturally. This takes about six weeks.
Leaves photosynthesize and recharge bulbs with energy for next year's blooms.
Leaves must be free to soak up sunshine. Forced tulips may not come back when planted in the garden. Hyacinths may come back with smaller blooms. Melody Parker is a Master Gardener.