Plant is having a bit of problems. Blackjack. Please help first grow

[Yummytrees]

I got my blackjack in my big tent under 800 watts (2 400watt cool tubes), 750 cfm exahust fan with carbon filter, 2 fans to circulate air, and a 150 cfm cool air intake. Temps stay around 77-85, Rh is anywhere from 40-60%. No nutrients have been added to the water. Only nutrients are in the soil. Soil is Fox Farm ocean floor. She is a little over a month old.

Please help. I am a first time grower and I have been having trouble trying to find out the problem. Could it possibly be ph problem?

 

[JJ Bones]

Most like moving some nutrients to the newest growth and sacrificing a lower leaf for it.

If you're at the 30 day mark, you need to begin adding some nutrients when you water.

 

[Medicatetoday]

Had this problem myself! check out your Ph and your water...

 

[Yummytrees]

Watered her with some nutrients. Any idea how much i should be mixing in the water? I mixed 300-400 ppm into 1 gallon and used some of that gallon to water her.I also ph'd the water to 6-6.5

 

[Yummytrees]

It was a ph problem. Check it out

 

[Medicatetoday]

Told ya