I do not use nutrients in veg or bloom with a breeding project I have ongoing. I do use 25% forest humus harvested from my property, mixed with peat moss and perlite as well as pure unfiltered unadulterated stream water. What I get is slower growth in both veg and flower stages, shorter internode lengths, bushy plants, shorter thicker colas, with more density and weight and a higher leaf to calyx ratio it seems due to the short stature of the colas.
Side by side comparisons, fertilized plants grew faster, larger, and produced more wet harvest weight. Overall dry weight was very similar. The plants grown without added nutrients produced: dense, tasty and smooth bud, even without curing, essentially just better quality.
Average bud size produced without added nutrients is 6" long and 4-5" in width that is rock solid. Here is a pic of one roughly the size of a softball.
I do not recommend that people forgo fertilizing their plants unless they understand the dynamics of a living soil system.