Hi everyone

I have a 6 year old bougainvillea in a pot, it�s about 4 feet tall. It overwinters in the conservatory and is outside for the summer months. It had plenty of colour for its first couple of years but has trailed off subsequently, finally to nothing this year. Before I throw it out, which I am inclined to do is there any I can do to revive it? I re-potted it about three years ago but it has shown next to no growth in size over the period I have had it. I feed it regularly over the summer months. Would a prune help it? If so when and how hard, I am prepared to be brutal with it.

Thanks Dit