My previously happy bonsai has been flourishing since November with an abundance of dark green leaves. However, two weeks ago, the unseasonably hot London sun seemed to have scorched it. It sits by the window to receive morning light, but I think this was too much, in addition to overheating the whole tree. The leaves turned brown and crispy (photos attached).
I am at a loss with what to do - as in the picture, it seems complete burnt with no signs of new life; no green buds just bare twiggy branches. I have moved it to a cooler shady area of my home and mist it everyday while making sure the base stays moist, but there is no progress. I also fed it with the bonsai feed, but have learned that this is not useful if it's not growing. I think it needs to be repotted, and there is some powdery white stains around the soil and ceramin pot (mildew?) and have added some new soil on top. I scraped a bit under the bark of the trunk and it is still green so hopefully it can be revived. Any advice would be greatly appreciated!
