I don't think you will ever experience that problem. I apply 2-3ml/L and never had any nitrogen deficiency symptoms. If that happens to you, you can feed more heavily, but rule of thumb is go easy and don't feed more than needed. Go gentle, if you see bottom leaves yellowing you might need to apply more nutes, but more likely that won't happen if you use the same amount as me in any decent potting soil.
Thanks for the valuable info man...really helpful. I don’t know though, i m completely confused for 2 reasons:
1) although i have some experience (at least that is what i would like to believe) i tend to lose my temper and make stupid mistakes. the most controversial thing though are the nuts. i changed them (not so pleased with Jungle Juice) and i bought the biobizz series (grow-bloom and fish mix) which, as far as I’ve been told, are pretty decent and not so dangerous for your plants. not to mention the fact, that the difficulties that derive from feeding are still something that i just can’t deal with (at least most of the times). for instance, the lady is in the 3rd week of flower and some leaves are starting to get yellow (lower ones). I’m still not sure what to apply for that, cal-mag or Epsom salts? i think this is a lack of N isn’t it?
2) drying and curing...this is a tricky one but irrelevant.
what if i had the possibility to add something like Epsom salts or cal-mag. would that make any difference as far as any delays in bud growth (given the fact that i am in flower phase)?