In need of some assistance

The color to me says it's hungry for Nitrogen, but need a lot more info though.
Soil type, nutrients, age, light distance, light type, light intensity, watering schedule, pH, and the strain. The other one looks spot on, anything you tried, or did differently between them?

It looks like it needs magnesium (Epsom Salt) and could be overwatered. How are you feeding and watering it?

R4V3N said:

The color to me says it's hungry for Nitrogen, but need a lot more info though.
Soil type, nutrients, age, light distance, light type, light intensity, watering schedule, pH, and the strain. The other one looks spot on, anything you tried, or did differently between them?

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It’s 2 different strains of kush and gelato cookies. Fox farm, rose bud bloom everything is organic. They’re almost 13 weeks. Mars hydro 3000…between the 18 to 23 inches from the plants. 65% light 18 hrs on 6 hrs off. Compost tea used every 2 weeks. Soil ph is reading 8 looking for ways to lower it. I’m thinking about adding aluminum sulfate and epson salt ,what u think

Maybe too soon on the booming nutes? She hasn't started flowering yet, maybe the raised levels of P and K, is showing as an N deficiency?

Before adding anything to it, I would be inclined to flush with a couple of gallons of water at 6.2-6.5 pH, and get a vegging nute/amendment in their directly after the flush. Then let her dry out for as many days as it takes on a reduced light, before watering again.

Also that's a hefty and powerful light, 65% might be too much for that one particular plant, using up all it's calcium and magnesium to keep up with the light?

There isn't really any leaf damage yet, so she's not suffering, but she is hungry for something. Slow and steady wins the race.

Just don't go nuclear before you have to.