I am new to the bonsai world and bought a snow rose in March. I purchased it from a Bonsai store on line. It was doing well for the first month and now has lost most of its leave. It is growing new leaves but the tips seem to turn brown and then fall off. I am careful of watering, no drafts, it is far enough away from south facing window and I try not to move it very much as I read it does not like to be moved. I live in Atlantic Canada and it is late spring here, I am in zone 5. If you could give me some advice on what to do I would greatly appreciate it. I have purchased new bonsai soil but I am hesitant to repot as it might stress the plant more.