Help! My Buds seem Small?

hi guys im day 35 into flower and my buds seem to be small is there anything i can give them ontop of wot im using ( bio bizz all mix with bio bizz nutes grow bloom topmax with 600w air cooled hps growing 10 cheese in a 1.5x1.5m tent)

sometimes they take a good few weeks to swell out from what I have seen with other grows. Another grower I know, his buds took a good few weeks then they just exploded and got huge.

Just flower them until they are ready, often strains can go a good 3 weeks or something over what the seedbank may say.

They WILL get fatter with what you're already doing, naturally, with time. But they do look a little hungry....

they look oh so lovely to me, nice and frosty, and just about right on target for only 5 weeks of flowering.. they will start to fill out nicely in the coming weeks..
usually the first two weeks or so of flower, you don't see much in the way of bud development, and more so of the stretch phase of flowering, then you start to see small buds forming..
in the coming weeks, 4 /5, you start to see what actually look like buds, just not very big yet.. in the next two or three weeks, they will really start to fill in and look oh so nice.. the last couple of weeks, they pretty much just swell and don't get much bigger length wise..
this is all strain dependent of course as all strains grow and mature quicker or slower, bigger or smaller, indica or sativa..

finish it out. don't judge till its harvested.