Eledin said:

You think it could be light intensity or heat? The top leaves barely have any yellow on the tips. I never used Fox Farms but everyone I see with problems is using that soil or an all purpose soil (maybe its just cause its sold a lot in the US not because it causes problems and all the newbies with problems come using that soil).
"Garden tip: Designed for containers and ready to use right out of the bag. There’s no need for nitrogen fertilizers at first; instead try FoxFarm Big Bloom® Liquid Plant Food to get things started."

Ocean Forest® Potting Soil - FoxFarm Soil & Fertilizer Company

Our most popular potting soil, Ocean Forest® is a powerhouse blend of aged forest products, sphagnum peat moss, earthworm castings, bat guano, fish emulsion, and crab meal.

foxfarm.com

Too many nutes? Too little? I dont know with that soil but it has organic ammendments. Do you have microorganisms?

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Captspaulding said:

You are cooking them.
What is the out put and height of your light.
Heat isn’t always what cooks them.

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Eledin said:

That soil is sus af. Its meant to be used for organic growing with microorganisms. Did you add them? Do they come with the soil? Do you use tap water? Do you get rid of the chloride and chlorine if so? The ammendments that soil has wont work very well if you dont have beneficial microorganisms. Specially knowing that lately FoxFarms is selling worse stuff to meet demand. I doubt they let the ammendments decompose over time if theyre uncapable of letting their compost be fully composted (hence why so many critters sometimes in their bags)

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Captspaulding said:

I know that ffof has a bad rep for that, but really it’s not that crazy hot, I know you or I would throw a seedling in it walk away, and be fine. It think it’s the combination of heavy hands with nutes, and a soil already stacked with plenty of food.

As far as the heat/light intensity, man it’s a big driver of issues these days. If you look at the leaves the lowest ones yes they’re yellowing and stuff like that and N is definitely an necessity but if you look at the plant, it’s the side that’s closest to the light that’s yellowing. It looks like the other side of the plant is nice and lush and dark green usually a pretty good telltale sign, some of these cultivars are extremely sensitive to these LEDs at first now. I could totally be wrong here, but I’m also looking at the cupping of the leaves as well. It’s not extreme yet but it’s definitely

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Captspaulding said:

Yeah I’d raise them to about 30in,
That’s where I keep mine Iin Veg
Output is good. Def close tho.
I never go above 40% in veg either.
These lights nowadays. Even the small panels, crank.

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euphoriaup said:

I haven’t added any nuits to it because everyone I see that uses this soil says wait like 5 to 6 weeks cause the soil usually burns young plants

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jrok96 said:

next time you water be sure you have runoff and check the ec from it and take the guesswork out of it. are you using tap water?

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Captspaulding said:

Start feeding 1/2’dose right as they get to veg. I used to use it a lot, it became inconsistent.

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Blastfact said:

Your plants are starving to death. Your ph'ing down for no reason and have wrecked the soil. There is nothing wrong with FFOF. Depending on plant/genetics, lighting and environmental conditions a plant can be fine in the soil only for 2 to 3 weeks. Then it will need fed. Either organics setup when you start the pots or go on liq/chemical/salt ferts when needed. Anytime plants get unhealthy or stressed the wrong way to much light always makes the situation worse. At that point the perfect amount of light can be to much light. If your hell bent and bound to ph your water in a soil grow get it to 6.5 and stop watering to run off. You worry about ph in coco and hydro and even then it's a balancing act with ppm. Those pots look awful small and small pots can bring stability issues to a soil grow. Good Luck!

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euphoriaup said:

I may have but the moment they grew their first leaves they were burnt like that and the water I was using was distilled when they were seedlings. So the ph down with my well water is needed.

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