My deshojo maple bonsai started showing brown tips on the leaves and it's stressing me out. It's supposed to be bright red and lush right now in June, but something is off. I water it regularly and make sure it's not in direct afternoon sun, but maybe I'm missing something? Could it be a soil problem, or maybe the pot is too small? I'm worried I might have over-fertilized it last month. Anyone else had this happen with their deshojo, or have any advice?