I started with 5", and would still use them for some grows...just because I already have tops and the netpots... I prefer the 3.75" for the reason stated above, and that is all you need. A 3.5"holesaw(25bucks, but worth every penny IMO) makes a perfect tight hole, and this myth that you need giant netpots to grow big'uns is nonsense. Believe me...no matter what size netpot you use; If the plant get's that big...you will have to tie it off. Trust me! My flower room was 8x10x8' Not to mention...You can buy 2wice as many for the money!

So you found my thread?