Please help! first time growing brown leaves

[Optimus PrimeBud]

I'm a newb at this I am sorry if someone has already asked this. I've never grown before my plant is about 1 week old and the rigid leaves are doing fine but the oval ones are turning light green/yellow. I water it once a day its a hydro in rockwool with a light about 4" above it. I did give it one small drop of miracle grow is that the problem? I need this plant to live and I'm trying hard to keep it alive please help me don't let my plant die. Also any suggestions on my grow room set up would help. There is a fan always running on low so the air doesn't stale.

 

[JJ Bones]

You have some reading to do my friend!

How to Grow Marijuana Everything You Need to Know

Photo Gallery Guide: How to Resize, Upload & Post Photos

 

[Optimus PrimeBud]

Ok i read some things and I got the pictures up any idea what could be wrong?

 

[JJ Bones]

Its possible the Miracle Gro was too much, did you dilute it at all? Or literally put a drop of the concentrate?

 

[Optimus PrimeBud]

I literally put a drop on it....is this bad? what should I do?

 

[Optimus PrimeBud]

My plant is getting worse by the day, I have checked different causes as to why it would be dying. A d everything I've tried has no effect. Does anyone out there have any suggestions as to what I might need to do, or
what is wrong. Could it be the light I am using? The water? Or maybe the nutrient?