Hello, I got my begonia couple of weeks ago. I placed it in a semi light place in my balcony and water it every time the soil on the surface is dry (apx every 3 days/outside temperature apx 27°С). The problem is that the plant's leaves as falling every day, since the first day I bought it. Every day I clean the balcony from the leaves and the next day I find apx 10 leaves on the ground. What is my mistake? Maybe isn't this plant an outdoor plant? Thank you!