Would #001 be suffering from heatstress or has don...

Hello ! 28°C is not enough to have a light burn , I had a light burn on my actual Blue Dream run and it take 3 days with the leaf stick on the 150w Hps bulb to burn the leaf , and 2 days under an UFO led for my actual GSC, I'm also growing with a temps around 28 to 31 during daytime and my plants are fine ( maybe the yield is lower due to the heat but my leaves remain the same and does not get damaged. That said you should be careful about your PH in soil 6.2 to 6.5 PH is the sweet spot ; your feeding is also a bit shady because you don't know your input values ( in terms of EC or PPM ) so you can't really know if you are under feeding or over feeding your plants. Can you please take pictures under a natural light for a better diagnosis? I hope it will help you 😁✌️🏼

hi, its easier for me to diagnose plants if i have pictures in natural light. i see a discoloration and tacoing leaves. Tacoing leaves are a sign for high temps. Any other diagnosis is just guessing or rolling the dices, If you want a serious diagnosis, take pictures in natural light, or do selfdiagnosis at a helping site

Hey there , this doesn t look like heat stress to me, actually plants are very strong up to 30°C more or less, so don't worry about that. One thing i dont like is the "cupping" of the leaves, and the brown spots coming on. I think you have a root problem probably due to slightly over or under watering which in turn caused some PH fluctuations which in turn created some root problems. I recommend therefore to make sure you follow a very strict wet/dry cycle, maybe add some enzymes or humic + fluvic acid when you water, hopefully this will fix it. I hope this helps you my friend ! 🚀