is it time to switch to flowering fertilizer?

They're from bag seeds so I'm not sure what the strains are or if they are auto or photoflowring. Thanks in advance.

They are already flowering so if you've been doing 12/12 light schedule from seed I guess you may not know, but if you've been doing 18/6 then you have autos.

I would be giving them flower nutrients yes, they are well along their way. Nice looking plants.

2 weeks after flower begins Start bloom nutrition If my plants are heavy on nitrogen
I’ll start sooner