Hello, Our Japanese Umbrella Pine is about 17 years in this same location directly in front of our livingroom window. In Nov 2014 it started tipping over, so we pulled it back and secured it. In Feb 2015 it is starting to wilt. The top of it is flopped over, and the needles seem to be flopping over as well. The tree is still a lovely green colour. What could be causing this? We haven't changed anything that we been doing to it in the past 10 years.