Hello everyone, I need your help. I planted a lemon seed in April of 2017. It did very well, it stayed green, grew healthy leaves, and I never saw any yellowing or browning. It was also outside for the warm months. But here's my problem. I brought Lemony (my lemon tree) inside in mid-October because the temperatures became too cold. It was doing very well. I rarely watered it because the sun wasn't evaporating so much of the water anymore, but I never saw problems with it. This January, though, I noticed fully dark green leaves started dropping off my tree. At first they started at the bottom and one at the top. I gave it some water when I noticed that because I thought it was because it didn't have enough water. Today I saw another leaf fall off! I prodded some others to see if they were strong and yet another dropped off (the others were pretty sturdy though). I do not know what has changed and why this is happening. We did have a pipe burst in my home a couple weeks ago and they're now just fixing the floors, and because of that, I had to move my tree upstairs, where there is a lot less lighting. I'm not sure what to do. Will my tree be okay? Also, it started with about fifteen leaves, and it's down to about nine. Will it be able to survive if it keeps dropping more, and is there anyway to encourage leaf-growth during these winter months?