Not sure if I need to prune my tree?
I have a lemon tree that I grew from a seed that I got from a grocery store lemon. I do not know exactly what kind of fruit it was, and I live in a fairly northern area so it is potted and spends most of the year indoors. I have it outside for the summer and it has shot up in the last few weeks. I was pretty excited about that, since it hasn’t grown much in the last couple of years (it is about 3 years old).
Now, however, I think I might have a problem with suckers? I was looking online for advice about if I needed to prune my tree, given that it’s fairly small (about 3.5 feet) and young, and I saw everyone saying you need to remove the suckers. I’m not much of a gardener, I’m not sure if what I have are suckers or just a really tall branch?
I’m not looking to promote fruit growth, again I don’t live in a very lemon friendly climate so I don’t expect it to produce fruit at all, it’s more of a decoration/hobby plant. But I would like to keep it healthy and alive. I hate to cut the tallest branch off for no reason, anybody have any advice?
EDIT: I meant to attach some photos but I couldn’t figure out how, I will add them in the comments.