What nutrients are you using? I'm not a professional, but I use Biobizz; they're easy to use, but they might not be the best. 1st week regulated water only / small doses 2nd week Roots juice / something good with NPK (small doses) ** 3rd week start using bigger doses but never the recommended * * ex: brand recommended Roots 4ml/L, so I used 3ml/L ** just a little small differences But if you see that the plants are looking for more or less, you need to adjust and see the better way (I think the doses recommended by brands are higher so they can sell more)