Help & Advice needed for Autoflower turning yellow and leaves curling (pics)

haha no problem. Now believe me, you CAN do it 12/12, you just gonna get less harvest. Cause I threw 4 auto's in to my 12/12 flowering tent right after they sprouted and still got decent results from them...bout 20g per plant under 400watts light. But you wanna reap the best harvest you can I'm sure

Yeah man definently wanting to do anything to increase my overall harvest
Theyve definently woke up since i changed the light schedule and cut down on the watering,
ive began to notice some yellowing on the first true leaves and the 2nd


Any ideas why this would be happening, woundering if it would be time to introduce them to sum nutes.

And does anyone know how to resize images on ah forum lol

What size pot is it in? Looks to me like a pH problem, but it's a bit hard to tell from the coloring in the pictures. Any way you can test the pH of the water you are using? And the runoff from the pot after you water we need the pH of that....that soil mix looks like mostly peat moss which would make the pH acidic, locking out nutrients even if you were to add more. You really won't know unless you get some litmus paper or a pH probe and check.

Heyy man this is gonnah sound stupid but im not sure how big the pots are ) , their about 9 n half inch tall.
i had a soil ph tester when i checked it, it was at 7, ill need to pick up some of them papers or a pen tester.
And yeah i think the soil is mostly peat moss

what would you says the best method for checking ph of the water?
ther seems to be lots of controversy on the ph probes, are the papers still pretty acurate

Originally Posted by windpot

what would you says the best method for checking ph of the water?
ther seems to be lots of controversy on the ph probes, are the papers still pretty acurate

Yea I'm not sure you'd want to go and drop a hundred dollars on one of those pH probes. The litmus paper is fairly accurate (down to 1.0pH, whereas probes are usually accurate down to 0.1pH) just get you some with a color code chart to tell what pH you are reading. I always get a small cup and put a coffee filter on top, then when I water my plant, I let the runoff go into the coffee filter, keeping any dirt/debree in the filter, and then all you got in the cup is the pure runoff water that you will then test with litmus paper.

Yeah man was thinkin tht, if i need to go more accurate ill maybe consider it in the future
Sweet ideaa man, pretty sure i have an old strainer lying around sumwerr :P
Was thinkin if the water is too acidic coz i checked the soil ph n it said it was neutral,

Hey man, still waiting for the ph strips to come, in the meantime i gave them a watering and collected the run off in 2 cups, going to test them when the strips get heer.
The damage seems to be spreading a little pretty slowly, i got some bonemeal to kind of raise the ph a little, jst mixed a little in with the top of the soil.