I'm a newby with Bonsai. I have a Fukien Tea and a Sweet Plum. Both are about 2 months in my possession. I live near Dallas Texas where it's been over 100 degrees for weeks. I only have a decent sun exposure that sees sun from around 3:00 to 5:30 (hottest time of the day). I was advised to leave these trees outside with a few hours of sun daily. Watering advice has been all over, from daily to soak entire plant container for about 15 to 20 minutes when it becomes dry. What I have experienced is not good. Both trees are showing signs of some kind of stress. I'm not sure if the issue is watering, which I do daily in the evening, or heat related, or light related. I decided that the heat was probably excessive so I brought them indoors for a few days. I don't have a good spot indoors that provides proper sunshine. I bought a grow light fixture (T5) 3 days ago and they both seem to be showing a little recovery in new growth.
My symptoms are yellowing, browning, leaf drop (Especially the Tea). I'm not sure how much light they should receive from the fixture. I have a programmer set to deliver 5 hours a day, for the past 3 days. They have been in my shop, with the new light, which is somewhat cooler than outside. I have several high quality close-up photos showing the indications. I don't know how to make those available to a forum replier. My tress are saying "Any help would be appreciated".