Howard, you will get much better responses if you post this in the Citrus forum. There are a lot of very experienced growers there and from all over the US.

These threads are kind of entertaining and somewhat bizarre, I can’t stop reading them. If you said you wanted to loose 20lbs I‘d say it’s tough but if you work at it you can get there. If you said you wanted to be 4 inches taller I would say put your energy into something else because it’s not going to happen. You might get a little taller working on your posture maybe some back exercises but only 1/2” or so. You certainly can grow lemons anywhere in the world if you keep them indoors. People have been hybridizing citrus for centuries, I think all of the edible citrus is the result of hybrids but in all of that time, this is as far as it has come. A few more centuries who knows, maybe.

Howard. All trees are dormant at -5F. the question is can a lemon tree ever adjust to those temperature and survive. That answer is also NO. You can increase its cold tolerance by slow growth and early hardening over caused by clayish soil, but not to the degree you need. You will only get a lemon down to z6b by mutations that survive the cold. In time you may get the lucky seed. The more seeds you plant the more chances you have. Right now the best you can do is a Harvey lemon grafted to Flying dragon rootstock. The FD rootstock produces better lemons than the lemons own roots could do and adds 5F colder tolerance.

Do I need some fertilizer for my seedlings