Stress

I don't like Plagron, I think they got a lot of garbage products and only some good ones, Better options out there for well rounded feeds. Back when I looked at their product line hey had a terra lineup of stuff. the teara soil was really soilless and not soil, then their terra matching feed for it did not have any Ca or Mg added in amounts that would benefit plants, as its "soil" and soil has its own Ca and Mg thats why it was not added in the feed in larger amounts, meanwhile its terra medium was not soil. just causing issues down the road. The only one that was fully fortified was their hydro coir lineup. just seems dumb to have so many options that will all cause issues when you can make one thing and do it well. If it is reacting that bad at a low dose its not likely a good product or batch. emailing them and ask for your money back. Good points about PH and EC and medium used. could be having an impact on your outcome.

Normally the Green Sensations has a strong impact on the fisrt uses. In my opinion you should do a reduction of the amount of Green Sensations used on the first weeks of schedule and you should use some Ascophyllum nodosum solution (kelp solution - the one from Cultivers Amazon is great) and use it for a couple of days. Try as wll to charge a little bit on the irrigation at least a couple of times during the week with some Cal Mag at 1/10 of the total amount. The curling could be as well hidric stress due to heavy irrigation , so try to irrigate at least at 1/3 of the total water that you using daily.

I cannot say whether tips curl up due to inappropriate feeding or heat stress. It looks like upper leaves have more problems than just tips curling up... Just a note: when you start giving Green Sensation, neither Zym or Roots are necessary.

what medium are you growing in? whats the ph?? if you can link the diary or give me some more info cheers mate