Hello! I have this Azaleea Bonsai, whose leaves started to turn grey-brownish. I would like to know what could be the cause of this. I water it about every second day, and since 2 weeks i am using a liquid fertilizer.

I attached the images to my post.

Thank you in advance

I hope I am wrong but it looks as if this plant is inside. Watering to a schedule is not the correct way, water when needed that is when the surface is almost dry. If you do have it inside, then you will continue to have problems with it due to lack of light etc, and it will not survive. At the moment there does not seem anything wrong with the leaves, but it is summer and light levels are high