I received this Japanese Red Maple tree 2 months ago. I transplanted it to an 8" clay pot at 13" high and it sits indoors in front of a southern exposure window which this time of year the sun is too high to shine on it directly. Could someone please tell me why the tips of even the newly sprouted leaves are curling and drying up and eventually the leaf falls off? Should I prune the effected leaves even though some are still more then half green? I water it thoroughly every 7 to 10 days along with a 1/2 teaspoon per quart of Miracle Grow when it feels relatively dry to my finger and the moisture meter also reads 1. I transplanted it into Hyponex Potting soil. Any suggestions would be greatly appreciated.