Guzmania Bromeliad

Question

Do you cut the flower off when it dies?

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Answer 1

Yes, you should cut off the dead flower.

A bromeliad only blooms once in its life, but you can still use yours as a foliage plant. If you want more flowers, the small plant growing next to the parent plant in the photo, and any other offsets or "pups" you find, can be transplanted and nurtured to produce their own flowers:
https://www.gardeningknowhow.com/houseplants/bromeliad/getting-bromeliads-to-bloom.htm