Brown leaves

I'm going to agree with my growmies here in that these are very much overfed... but I'm NOT going to agree that you can resolve this by doing a slow flush (i.e., just plain water for a couple of days)... this is much too extreme to waste precious time. You need to run 3x the pot volume of pH'd water through each pot - for you, that means 75L... and make sure it's pH'd! (your experiment with a pH of 5.7 probably did them a lot of harm as well) ... the pH for soil needs to be between 6.2 and 6.5 - but you should try to zero in on 6.3 as being the sweet spot. Measure the runoff of your flush as you near the end... if that pH is not down at 6.3, keep flushing until it is... and then let her dry out. When you resume your nutes, give only 1/2 strength for their first feed and then SLOWLY increase if you think they need something more... it's easier to fix a deficiency than it is a toxicity (and get rid of the Power Roots - that is only beneficial to the plant in the veg state). I would check the NPK of any of your nutes and make sure you're not giving something that has a lot of nitrogen in it (since that info is not contained on the label on the bottle, I'd have to go do some research to try to find that info - but you can do that).. Plants in flower do not need a lot of nitrogen - they need SOME but not a lot... Finally, make sure you're practicing the water/feed/water/feed routine.. and when you water, make sure you're getting at least 10-20% runoff - and check the pH of the runoff every time because that will tell you what's actually happening inside your soil... Good luck!

Burning from over feeding, plain and simple. Sativa dominant strains need much less feeding than indica dominant strains, hence the more burning on your Lemon Orange plants. Plain water for a 7-10 days then back to feeding with half strength (sativas) to three quarters strength (indicas) of what you have been using. Damaged leaves won't recover, but this should slow the problem from getting too much worse.

Hey Fam Looks like Nute Lockout to me Try giving Straight PHd water next few days and see how she reacts I hope this helps and I hope your able to turn her around

thats too acidic feed was made, you burned them insane 5 years ago it happened to me , while i was adding sugars to feed ... could not return worst girl flush flush and only flush, looking at your start , you should know all the drill already ! check ph, ec of runoff and most prob flush only way ...

Hi there To me it looks like severe neut burn and the dose your feeding look really high? I would feed we’ve just water the next couple of times and then check your feeding chart make sure you’re feeding him the correct dose per litre.. I would also raise that light a bit it looks very close in the which could cause a bit of stress going forward, Best of luck 🌱