Ponta das folhas de baixo queimando

hey there again, burnt tips is always nutrient excess. In your case it's Nitrogen excess as you can see from the oldest leafs being affected first. This stage is burning and yellowing at the tips, the next stage is lock out of the nutrient. What you want to do is cut back on feeding, only feed NPK every third watering so water, water, feed, water water feed. only feed every 10 days minimum , right now you want to water with plain water until the water just starts to run off, then add 20% more water, and follow a strict wet dry cycle from now on. Hope this helps ! 🚀

I'm not an expert growing in soil but I know they need very little nutes. My plants are in the 5th week now. I grow in nutrimix hp mix. Just that, no additives. I feed a one part mix floranova for veg, max ec is 1.6 or 800 ppm. In stretch max 900 and in bloom I feed canna terraflores and add massive bloom formulation. I run the ec at 1.2 or 600 ppm at this point. I water feed water feed and let planters dry down a couple of inches each time before water or feed. I have never had any serious issues except for a bout of spider mites for one crop. Got rid of those buggers quick. They will ruin your crop. The floranova is great and can be used for soil as well. Only feed a little every couple weeks in soil.

Dude sorry to say but I believe the nutrients you are using are not nutrients at all but a supplement formula... Nutrients for Cannabis need at the very least N-P-K and I don't see these anywhere on that bottle even with my poor understanding of that language.