Yellow Crispy Leaves in flowering, brown spots on leaves

I had this problem for 2 consecutive grows. Each time I could not figure out what the hell was going on.

Was it my tap water?

Was it my soil?

Was it my nutrients?

Was it a PH imbalance?

I tested everything constantly. Tap water appeared to be fine PH-wise, same with nutrients. So what the hell?

Well, I finally figured out what my problem was...

I let the plants sit in the run off. BIG MISTAKE!

I had 25 plants going in a grow tent and figured the run off would just evaporate but in retrospect I believe I was wrong. I now believe that the plants were just soaking the run-off water back into the pots thus created a super acidic and salt filled soil, particularly at the bottom of the pot. This is probably why soil samples from the top of the pot showed a decent PH, whereas runoff showed a really bad PH.

Going forward I'm going to purchase a hydroponic table to let the pots sit in approx 2 feet off the floor. I'll use a drainage hole in the hydro table to get rid of the run-off and hopefully this will resolve the issue going forward.

I wanted to share this information because I always posted my problems and never got any answers that fit the problem. So folks, if you're experiencing the same issue and letting your plants sit in the run-off well, that is likely your problem.

Hmm, never gave that much thought. Id like to see what other say about that but it does make sence!

I have had this happen. With mine heat and ventilation was the issue. Being zipped up in my tent and temps staying in the high 80's with poor ventilation was hard on the girls. Might be something different with yours but stale or constant warm air will do it every time.

By the time I'm well into flowering most of my leaves look like shit. The bud n the other hand is always A- 1 kick ass smoke.I believe it all has to with the seeds or clone if it's quality so will be your grow. Unless of course you are a complete fucking idiot

well if your leafs are starting to look like this then its a cal/mag deff........View attachment 2688058View attachment 2688059

not necessarily so. I thought the same thing, I gave them Cal/Mag and it got worse! Gotta be careful with nutes and salt build up, adding nutes can make the problem 100 times worse!

I need to see pics. May be a fungal disease

I start the seed in a small starter pot.

I then transplant to a one gallon pot wedged into a smaller pot.

So the pot with the plant is a few inches off the ground and well away from run off water.

I also keep them off the ground in the final grow bag on a baking tin with a grill tray on top.

With the air input fan blowing air underneath, it should make for good aeration.