Wouldn’t grow something from the inside require a very strong force to “move” the already present one? Instead growing from the last “layer” towards the outside would require a lot less force, but perhaps a lot more matter.
Is it even correct that trees grow concentrically?
Now that I think about it, how do plants grow in general? Hahaha
Update: for everyone wondering, yes, my question doesn’t make sense because the i.e. contradicts the question. I don’t want to correct it because I don’t know which part to correct since I was wrong, I thought trees grew new parts inside and pushed older parts outside. So I could correct the i.e. and swap “innemost” with “outermost” but that would mean that people would read a question stating something that is wrong, or I could correct the question and swap “inside” with “outside” but I was wrong and I’m glad I learnt something today. We can all agree that I asked a weird question in a weird way, thank you all for your answers.
So, the inner rings are actually the oldest. I’m no botanist, but I know that with your average deciduous tree, you have a layer right between the bark and first wood layers, and that thin layer is where the cell division for growth is mostly occuring. So, it actually is the exterior, just right beneath the bark.
Other kinds of plants are probably different, and again, I’m no botanist. Just have some basic biology study.