My lemon is in an odd pot hubby found. There’s a place in the city where hubby sometimes works that people recycle pots, you leave what you don’t want in this bin in a parking lot and you take what you want. He checks it a couple times a year for me and brings home any big pots, clay or ceramic pots. My lemon is in one he found that’s tall and about 18” in diameter.
Our deck faces southwest and its right off a glassed in sunroom so it’s stayed on the deck in summer and in the sunroom in winter. This year the trouble has been constant wind. There is no place outdoors to protect it from wind as we are right on top of the tallest hill in the area. Even moving it around the house doesn’t get it out of wind. It’s spent much of this spring/summer back in the sunroom. It has direct sunlight this way and has sprouted new growth but I also have to be careful of leaving it in here because if we leave, shut the windows and doors the heat cooks the plants. Generally the only thing safe to leave inside with the place closed up and locked down is cactus. I had a greenhouse until 2 years ago but it finally fell apart. Hubby is actively using his Craigslist addiction to find materials to build a more sturdy greenhouse.
Outdoors I keep the tree atop another decorative container with no drainage that’s filled with rocks. It gets watered morning and in the heat of the afternoon and sits on rocks with water below for evaporative humidity. Indoors it’s in much the same setup on top of an old birdbath. I use the same fertilizer you listed with a bi-weekly foliar feeding of a compost tea spray. We’ve upped the misters around here for everything this year but the hot dry wind has taken a toll. Fortunately we’ve had a little rain 3 days in a row now so everything has perked up nicely for now but no more rain in the foreseeable forecast.
Meyer lemons will bloom and set fruit throughout the year. You might have to keep it inside then just with bright sun and/or a plant light of some sort. There are lots of youtube videos on how to pollinate citrus. We pollinate wintertime blooms with cheap paintbrushes from hobby lobby. Just keep it fed and it should be happy.
My citrus spends the winter in front of my living room picture window. Perfectly happy.