United Kingdom 
once tulips have flowered what must be done after flowering
28 Apr, 2010
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Leave the foliage to die back naturally and water with half strength tomato feed. Then just leave them alone and they will flower again next spring. If in pots after the foliage has died back completely and then plant in the garden or allow to dry out and plant in the autumn. Better to use new bulbs in your pots.
28 Apr, 2010