what can I do to make my meyer lemon tree stop losing its leaves and fruit when bringing it inside in the fall for the winter. After two months of bare branches, its just starting to show some life in a few tiny leaves starting to sprout.

There can be several reasons why the plant is dropping leaves, mainly due to stress. Reduced light intensity and duration, temperature changes, insect problems (mites) cooler soil temperature, cold drafts, humidity levels, nutrient deficiencies. And sometimes it is a mystery! I have a lemon variety that has lost = of the leaves under almost ideal conditions!

I had two. Killed one by bringing it inside too early. Too warm?? My other one I brought into the sun room once it started getting cold out. The room is drafty and gets partial sun. Rigt now it has a few buds and 1 good sized lemon forming. Do you pick them when still green??
Here is one tip I read: Never fertilize citrus plants when fruiting. Trim to shape after fruiting. And I saw a tip for an indoor navel orange tree that in the winter, the leaves may turn yellow, in which case it needs a dose of iron chelate.

If you didn't fertilize citrus while it was fruiting, it wouldn't get much fertilizer. Citrus blooms in the early spring here in Fla., then sets fruit that does not mature until fall or winter. Some varieties bloom with fruit still on the tree. My key lime tree (in a pot) blooms and sets fruit several times a year. Regular fertilization is necessary.

That's funny, I brought my Meyer Lemon inside and it burst into full bloom almost immediately afterwards. I'm not sure if it was a fluke of timing, it was happy to be inside or it was bursting into bloom ina desperate move to survive!

It is in a very sunny window and maybe liked the warmth also.