Melaleuca alternifolia – No flowers – suggestions?

I have a melaleuca alternifolia issue I hope someone can help me with. Mine is about 8 years and 2 meters tall. It is a volunteer that sprouted near the parent plant which I potted and replanted. Can’t get it to bloom.

The parent plant bloomed regularly. Unfortunately, I lost the parent plant in an unusually hard freeze.

Any suggestions for encouraging blooms? Location is Houston Texas area. This tree is not common here. When the parent plant bloomed it attracted much interest.

Thanks.