Coir and perlite or pumice, and a little activated charcoal to balance fertilizer and pH. A little bit of sphagnum moss near the bottom roots provides some extra protection from dry indoor air.

No compost or smelly organic fertilizers. The outdoor microbes will die indoors anyway, so you end up with a fly problem once it starts leeching compost juices.

Liquid fertilizer and slow release Osmocote pellets are best, in low doses, or none when the tree is transitioning or sick.

You can try lime again. I know mine died a few years ago because the soil was too much wet organic matter (peat). A hardy variety might survive better year after year. Persian Lime I think is what local nurseries sell for our climate.