Week 3 is what I do with half strength
Depending on the nute and surface density on the nute.
So mine says 30ml for 7 litres which is around 220ml for 1 drop.
I give 450 ml just less than a pint.
If your leaves are lush green then dont give too much N, will beconcentrating on Veg unless you want it to.
Best is when you see budsites, I did 2-2.5-4 Half strength on week 3 and nuting every other watering...so its once a week
Week 4 1drop for 250 ml.
Week 5 same.
Week 6- I cut down nutes.
Week 7 Flush.
and so on just try to accomodate nutes according to predicted harvest period.
Potting mix is also a factor, coz some have nutes in them.
Finally, its satisfactory to not to over nute to stay on the safe side buddy.
Hope it helped, any doubt ? Do let me know, and I will do my best.