Those small pots will cause all kinds of problems including deficiencies. They are also harder to water correctly.
Check the damage done in the beginning of my grow thread. Doing the root pruning thing again, this time with MicroKote
I upcanned 2 Maui Wowie to the final 2 gallon treated pots when they were single leaved juveniles and they have already outgrown those started one month before. In fact, I applied Paclo Pro to one very vigorous MW yesterday. Will go 12/12 today.