Howdy, your flowers should grow a bit more, but, to be blunt, by not a huge amount. I noticed in your diary that you are only using "aqua vega" as your main nutrient, which I believe is designed more for the vegetative growth cycle. It may help to give your plants a dedicated "bloom/flower" type of nutrient as these have a different formulation that is for optimised flower growth and this may help to give your flowers a bit more density. Otherwise you could start using a separate "P/K" booster in addition to just continuing with the "aqua vega", if this is easier for you. During flowering, cannabis needs less nitrogen than it does during the "grow/veg" stage of life and needs more phosphorous (P) and potassium (K), for enhanced flower growth, and this is why nearly all fertilizer manufacturers offer different lines of nutrients for either the "grow/veg" stage and another one for the "flower/bloom" stage. It is generally accepted that "grow/veg" nutrients are stopped once the plant has started to form little "budlets" then change over to the "flower/bloom" nutrients for the rest of the flowering cycle, until just before harvest, where plain water is only given to give the plants a bit of a "clean" or as has become a popular saying, a "flush".
Hope this helps,... Organoman.