I've been trying to grow a bougainvillea for a bonsai. However I seem to be having problems with it. It's kept indoors at temperatures around 20-25 degrees c under a bright led light at the moment.

it was grown from seed around 7 months ago. But it has now stopped growing and the leaves look very bad. The leaves are wilting and some even seem to be going a very pale red.

if someone could tell me what's wrong with it and how to fix it id be greatful

thanks :)