Hi, so I am new to bonsai, my parents bought me one for christmas, trouble is, I live in upstate NY for the next few months. It had short green leaves and was beautiful, now they are brown and shriveling. I water it frequently like I was told on the brochure they gave me, but I don't know what I am doing wrong. Please help me. I am worried that, although it gets sunlight against my window, that since it is in the negatives outside, being that close to the window may be killing it? Any advice would be great.