I have a few different houseplants. I'm also currently starting a few different vegetables, from seedlings and from seeds. I've been trying to research the best way to grow all of these in containers, but there's a lot of conflicting information.
The consensus is that pots being too big is a problem - root rot, only repot a few cm larger at a time, etc. I've also had this problem with a lot of my houseplants, and needed to size them down. At the same time, every time I look up information on starting vegetables in containers, the pot sizes they recommend seem to be gigantic. For example, I have some jalapeno seedlings - the recommended pot sizes I've seen are at least 8"-10". Am I supposed to immediately plant in that size? How would a huge pot for the plant work out in this situation, but be advised against otherwise? Are you supposed to only water them shallowly, or something else that mitigates the whole pot being soaked constantly?
I feel like I'm missing something that bridges the gap between all of this advice.
Edit: To clarify, this is not specifically about vegetables/annuals - just an example.