Q.Lemon tree from seed year old but about 6 inches tall
I transplanted it to my flower bed last summer, i didn’t really believe it would survive the winter although I laid my cosmos plants by it when I pulled them up in order to shield from winter that comes down this hill we live on. Surprisingly it came back this year and I would love to keep it alive and try for lemons one day. Should I dig it up and transplant to a large pot to be move back inside this winter. I have a grow light although it is a cheap one and not very bright at all. South side of my house is occupied by a one of a kind globe maple.
Depending on your growing zone, you may be able to just leave outdoors.
Zones 9-11 can leave outdoors. Colder zones you will need to bring indoors.
https://www.gardeningknowhow.com/edible/fruits/lemons/propagating-lemon-seeds.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/how-to-grow-a-lemon-tree.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/growing-lemon-trees-containers.htm