I obtained this Meyer lemon tree from a friend about a month or so ago. I don't know where they got it from, but because the drainage in the cup wasn't good, I re-potted it into another pot. Since where I live the temperatures this time of year are far too cold to keep it outside, obviously I have to keep it inside. But it hasn't been doing too well and I'm wondering what is recommended to fix the issue of curling, browning leaves. I re-potted it again tonight with miracle gro indoor potting mix, so I'm hoping this might make an improvement over time. I don't know what soil it originally came in. I've been alternating between putting it near the window for some natural light and under an LED grow light that gets turned off over night. I water it thoroughly when I notice the soil getting dry, and let it drain well. The temperature in my house shouldn't be the issue. I attached some pictures of my plant's condition. If you have any tips on how to better care for my tree and fix the issue, I'd greatly appreciate it! Also am open to lemon tree care tips in general, since I'm new to this.