where to place my dwarf citrus plants?

Sonomanonas advice is great in USDA zone 9. If you get hard, prolonged freezes check with your local Cooperative Extension Office, use a heated greenhouse as they do in England, or find another means to prevent freezing.

If they are in containers, you have a lot more options.

I am assuming that you have the plants in large pots so you can move them easily (well, relatively easily, anyway.) Most citrus can take temperatures down to right around freezing but no colder. A prolonged very cold spell is more likely to be harmful to them than a brief cold snap. So basically, you will need to move them to a location where they are protected from freezing weather, and where they still have some bright light, whether it is in a south-facing window or are under artificial lights. Without knowing what your climate is like, and what locations you have available to you, it's difficult to give you a good answer.

I live in northern California, where we get chilly nights into the mid-30s fairly often in the winter, frosts pretty often, virtually never snows. My lemon & tangerine trees get by with just being moved close to the south side of the house, with a light covering (old bedsheets) when it gets down below 35 degrees or so. If you live where it gets bitterly cold, you will need to give your plants more protection than that, like moving them to an enclosed sunporch. Just keep them from freezing & make sure that they get good direct light.

I extremely have offered numerous dwarf fruit trees: Olive, fig, apple etc. the subject is that as quickly as they are interior the floor, after a on a similar time as they give up to be dwarf. They bear advantageous end result although.

In a protected place in your home with ideal conditions as follows: In a place that gets at least four hours of direct sun per day. 70 degrees daytime, 55 degrees at night. they enjoy a fairly humid air. Let soil get almost dry, then water thoroughly. Feed about once a month, skipping December and January. >:-(