Answer: Tulips form a flower inside the bulb for the following year's bloom. They need the energy that the foliage transports down to the bulb in order to develop the flower. So, it's really important that the leaves be allowed to remain until they die back all on their own. If you cut off the foliage last year, this would account for no flowers this year. To ensure your tulips bloom next year, allow the foliage to dry up all on its own before removing it from the bulb.
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