Hello all! I'm hoping someone will be able to help me figure out how to save my Meyer lemon tree- despite a rocky start in owning it, everything was leveling out until about three days ago when a large portion of the leaves suddenly started to dry up. Ever since I got the plant, it has been dropping a few leaves a week, which I assumed was because it probably came from a much more tropical environment. It started dropping more, which is around the time I noticed spider mites. After I got the mites cleared away and the watering schedule more regular, the leaves stopped dropping. The plant was doing really well for about a week and half, but now they just all seem to be dry and/or have small black spots. Soil + Water: I received this plant just at the end of December, and definitely made some mistakes in the first few weeks of owning it. It stayed in the plastic pot it arrived in for about two weeks and was not watered because the soil was moist that entire time. I then re-potted it into a terra cotta pot of about the same size (12"), fertilized it, and began watering it 1.5 cup water every third day. The 1.5 cup is just enough that it begins to drain, and the every third day is just when the soil starts to dry out down to 2.5" deep. I haven't fertilized it since. About three days ago, I forgot to water it (it was watering day) but I watered it the day after. Pest History: When the plant arrived I saw a few snail shells on the bark of the tree, but they were dry and did not have live snails in them. Several weeks later, at the beginning of February, I noticed the beginning of a spider mite infestation and wiped down the leaves with soapy water, with follow-up sprays of Dawn + water the following week. There are no traces of spider mites anymore. Details on Location: It's in an east facing window (we do not have any southern-facing windows), elevated on a table so it receives as much sun as possible (which is not as much sun as I'd like to give it), and about 1ft away from the windowpane itself. This space is above a heat vent on the floor, but the vent is closed and the table is a good 2ft above the floor. The only other thing I think might be relevant is that the weather in Nashville was freezing last week and we had plenty of snow, and the past three days have been much warmer at 60-70 degrees. I moved the tree outside on the porch just before I took those photos, and am planning to bring it back inside in about an hour (maybe it needs more sunlight?) There might be more than one problem going on here, but I would love to know if there's something I could do to fix this. I've seen a lot of different ideas - bottom watering, more sunlight, more fertilizer, might need more/less water - but I'm really not sure which one is most suitable for this issue. Also, is there any hope that the leaves that have already started to dry up might revive?? About the images: 1905, 1904, 1903, and 1902 were taken today, and show how some of the branches have all the leaves dried up (but still with some color), and how other branches are much less affected. 1781 is a great image of how the leaves looked at their healthiest (after the spider mite issue). 1779 shows some of the black spots present on some of the leaves. 1776 shows how the leaves had been drying up before this major instance- like when only a couple of leaves were drying up per week, this is what some of the leaves looked like. Sorry for so much information! I just wanted to be thorough upfront. I really love this tree, and wish I knew how to help it.