Ficus lost 80% of its leaves
I've been reading a lot on this forum on causes for the ficus tree to loose it's leaves, but not sure where to start with the rescue of my tree. I just purchased it in September and it was the most beautiful tree. Please see the link below for before and after picture:
As you can see the tree lost almost all it's leaves. I live in Boston, so it gets pretty cold in winter times. Also, I travel a lot, so I have to leave the heat down to 56-60F. When I am home, I raise the temperature to 68-70F. Maybe my tree is super sensitive to all the temperature fluctuations? Also, I water the plant once a week with about 1 cup of water. Is it too much? Maybe I overwater it? Once in a while I add "liquid Houseplant Food" to the water (8-7-6). To be exact, I did it twice ever since September. Also, about once a month i bring the tree to the shower and sprinkle it with room temperature water, and make the soil soaking wet to drain any remaining salts in it. Wow! Now that I described it all, maybe I do too much to my tree, and all this intensive care makes it lose it's leaves? Please help me figure out what am I doing wrong and how to save my tree. Thank you!