Please help: Dwarf pomegranate dropping leaves
Hi, I received what I believe to be a dwarf pomegranate bonsai as a gift a few months ago.. it was purchased by a friend at a garden shop and had been healthy - lush, glossy dark green leaves until about 10 days ago when it suddenly began dropping leaves. Some turned yellow (although not fully yellow), some just dried up and fell off. Currently no more than 25% of leaves remain and I fear the plant may be dying.
There are no pests on the plant - therefore I believe it's a problem with water, temperature or light. (Though it receives a lot of light.)
Could the plant be going dormant? If so, can I keep it alive ?
It is kept indoors - previously rotated in a window sill - I fear it may have become too hot in past month, so now kept further away from window, yet in bright light. I've usually watered when soil became dry, as necessary.
Once the problem began I tried watering a bit more frequently, then letting it dry out in case yellowing/dried leaves was due to under/over watering but it seemed to have little effect. It is an indoor plant - am in Dubai - desert conditions with temperatures exceeding 115 F this time of year..
I have read through the forum but couldn't find exact information and would appreciate any help/suggestions. While this is my first bonsai, I have many other indoor plants, and this is the first plant that's died back so am very concerned..
Thanks for any advise.