I am no expert with nobile Dens. , but have managed to rebloom the two I have. After the blooms have gone, it should start putting up new growths from the bottom. As they start to grow ands as the weather gets warmer, they require lots of light, lots of water, and enough fertilizer to keep them growing well and getting new bulbs plump. Use a low nitrogen fertilizer. In fall as the nights get cooler they must be allowed to cool down at night even to close to frost.(Don't let them freeze )
They need that night cool and day warmer to set buds which should show up just before winter. Once buds are started, you can allow more even temps. Cooler temp cause later blooms and warmer temps cause earlier blooms. I keep mine outside on my deck until temps are just above freezing at night and move them into my heated porch for winter.
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