Ixora flowering plus updates

Was it the recent rain, water supplied by me, fertiliser or just growth? I'm not sure but these have finally taken, it seems. Hope they grow even bigger.

Update 10 Jan 2018 - 

Loads of flower buds! Perhaps it prefers a drier soil? Next door completely ignore their's, and it is huge, so maybe that's the secret. Ignore it!

Update 12 Feb 2018: Looking pretty big and healthy.

14 Feb, 2019 - They are flowering again due to my regular watering, due to the severe drought.

3 March 2019: