I have three indoor meyer lemons. This pic is the aphids on one right after being sprayed with Bonide. I brought them in at the end of summer and they now for winter live a few feet under my T5 lights in the living room, which they seem to like quite well. They are all a foot or so high and probably 1-3 years old. I have pruned some but not lots. They've never had actual lemons. I bought them this spring and they easily doubled or more over summer. One of their siblings in my office at work has one big lemon but has never flowered at all on my watch so far,oddly. The three at home have been flowering for a few months; one seems to have finished and the other two have many clusters. Leaves are fairly healthy; medium to dark green; a few have those twisty-curly spots and bumps but not most. However, almost all the flowers fall off, often before they even open. It seems these should be the precursors of lemons, and they are all falling off!! ??? why are all the flowers and buds falling? As a separate issue, I also keep getting aphids; clusters appear on the flowers and then I spray them and wipe off and they return later. I say separate because even the buds with no aphids all all are falling. And I've also got what I think are intermittent fungus gnats - multiple tiny little guys in the soil and edges of pot. I have tried using Neem spray, on the soil and tried letting it "really dry out" before watering. Also tried a nastier spray a while back. Nothing totally clears them although the gnats aren't too bad right now but keep resurrecting; i know that's partly their life cycle but i have taken most recommended steps. I can't let the lemons totally dry out I'm already worried about the roots due to the gnats. Yikes, so many issues.

Well, I had 3 pots used last winter and all of them were populated by gnats... not millionsure of gnats, but enough to be a nuisance. If the pots are big (like 4 gallon or more), then it may be ok to use air pots. For the smaller ones, you can't let the soil to dry 1-2 inch around the circumference in order to kill gnat larvae, because the whole soil will become too dry. I still use my air pots just because I paid for them, and are better than regular pots. In the meantime, I made myself some fabric pots that seems to work (for roots) as well as air pots and don't let the gnats reach the soil.

if you take it outside.. full shade ... for a few weeks.. to harden it off to sun ... trees need to near dry in between waterings ... if you have been keeping it too wet.. like many houseplants prefer.. that is a possible problem ... transplanting an already stressed plant.. only heaped stress upon stress ... only time will see ... ??? .... lol .. time will tell ... let it near dry in between waterings ... unless you water so heavily.. that water run out the bottom ... then i highly doubt you need all the fert you are giving it ... you are just not washing it out the bottom ... lastly.. you are not thinking in tree time .... you say youve increased water.. and decreased water ... but unless you give it months in between... i doubt you could see a difference .... on some level.. you may be loving it to death ... put it somewhere.. stop moving it.. let it near dry between waterings .. insert finger .. and basically ignore it for a month or 3 .. ken

Hey all, starting a new thread here to avoid completely hijacking the one I initially posted some questions in. I just got a 2-3 year old Meyer lemon tree that is about 3 feet tall, and I'm looking to grow it fully indoors in my apartment. I understand this may not be ideal but I do have decent sized south-facing windows that get a lot of light, so I'm hopeful I can manage to get at least a handful of lemons. Picture of the setup is below, this weekend I'll move it upstairs where I have the same windows with all 3 shades always open. It's honestly looking a bit sad currently, the branches are much more droopy than when I first got it (and it was shipping in a box for an entire week). The blossoms are drying out, one fell off this morning. I just picked up an IR thermometer, with my thermostat reading 75 the soil temp is 60 and top of the leaves is 66, seems like an OK difference to me but I'm not sure what's ideal. Haven't repotted yet, it's in a 5 gallon plastic pot for now and I'm looking at moving it to a 5 or 7 gallon fabric pot when my new soil is delivered on Saturday. Looking for tips or anything else that would be useful to measure, I want this tree to be the best it can be (without needing an insane amount of maintenance) and I'm not afraid to get scientific with it. Thanks to everyone who has helped me so far and to anyone else who takes the time to read and respond!