10 gal. plastic pot, preferably on a dolly so you can move them more easily. Not fussy about soil, but feed with citrus food. As much sun as you can give them. Mites aren't a huge problem here, but Mealy bugs and scale are. Keep ants off of them, and if you can stay on top, Alcohol wipes or q-tips will kill them. If they get ahead of you there are many pesticides on the market, as well as insecticidal soap that list them. Whatever you use change it every fourth time so they don't build up a resistance. I would avoid any systemic, as these are food and bee crops. I hope you have some south facing windows, or sun room for the winter months.