I planted this little tree last May. It continued to do poorly...as soon as new leaves would open, almost immediately the leaf edges would turn yellow and curl inward. I gave it plenty of water so that wasn't the problem. A month ago I dug it up & put it into a large pot, good soil & brought it under a cover. My question is should I still water it when it's dry or just let it hybernate all winter? Was my location bad...to much sun? This tree is important to me as it was one of my late husband's favorites.