Leaves turning yellow

Hey, I have a plant under 2 flourescents tubes that have been being watered correctly and the leaves on the first nodes have begun to turn yellow on the end and shrivel up. I just want to know what the problem is before it dies.
Thank you very much

more info is needed and pics help.

how old are the plants? you using nutes? etc

ugzkmk said:

more info is needed and pics help.

how old are the plants? you using nutes? etc

Click to expand...

the plants are about 3 weeks old.
they are vegging
yea i have nutes