Hi there, I am completely new to anything bonsai and received this Azalea (I think that's what it is) as a gift a few weeks ago. It showed up looking great and I followed the instructions that came with it (generic outdoor bonsai care brochure) and had put it outside with sun in the morning and shade in the afternoon. I don't know if the sudden shock caused the leaves yellowing or if it needs some fertilizer...any help would be very appreciated. I have attached pics for reference.