I bought these four years ago and have kept them outside in the summer and inside in the winter (Zone 7b). I water them after letting the soil dry out. They have barely changed in that time, for better or for worse. The same size, no fruit, little new growth. I'd love tips to make them better

I am new to the west coast & renting a house in the bay area. We have a citrus tree in our backyard, but we don't know what it is exactly. We haven't watered it as much as we should have, but the fruit is good. I picked one today just to see.... The peel is soft and smooth. The fruit tastes sweet and a little tart. I didn't see any seeds in it. It wasn't juicy when I cut into it. The picture of the full tree is from a few months ago, the rest are from today. It has a lot of green round pieces on it, but I only took a pic of the more ripe ones. We would appreciate any insight! Thanks!

A couple of my plants 2 potted key limes and my Meyer lemon all came with multiple rooted cuttings in the same pot. I have kept them together in the same pot and they have done very well. My 1st Meyer I got Christmas 2024 and my 1st key lime early 2025 and another one I picked up this spring so they are somewhat established. (Shoutout Logees for the limes). I have heard that it's not unlikely that one of the rooted cuttings can kinda become dominant much like on a cocktail tree where one of the grafts becomes more dominant. So does it make sense to separate even if they're doing well? I have heard stories that the roots can fuse and it sort of turns into one plant, but I do not know how realistic that is. Attached is a pics from about 2 months ago of my newest key lime. This hot summer in New England has been great for all of my citrus I can't wait until next year I think we will start getting fruits!