I'm a first time citrus grower, have an Improved Meyer lemon on the back deck amd it is supposed to be able to handle some light frosts. Eventually it may have to come inside. In addition to some all purpose fertilizer, two tips: use a tiny bit maybe one tablespoon, of ironite every couple months and now and then a bit of Epsom salts. These supply minerals that aren't in all fertilizers. Plus let them get dry before watering. I have four lemons my first year.
