Answer: You've done nothing wrong, I assure you!! The bulbs have used up all their food reserves and need to rejuvenate themselves. It is a common practice to discard tulip bulbs after they have flowered. I'm sure you don't want to discard the bulbs, so digthem up and plant them in an out of the way place. In a couple of years they will have built up enough reserves to flower again. Dig them up after the leaves have faded. Daffodils can be moved after they have finished flowering and the leaves have started to yellow.
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