this is just a ballpark, you need to look at your plants and judge how they are doing
0-10 days 300 ppm
11-15 days 600 ppm
16-21 days 800 ppm
21-25 days 1000 ppm
after sexing
1-2 weeks of flowering 1000 ppm
3-4 weeks flowering 1200 ppm
5+ weeks 1300 ppm
then of course flush.
