Hey Guys!
Thank you for your replies.
I think I found out what the cause of the yellow leaves/nute burnesque leaf tips..
A few days ago, I saw a couple of nasties on my plants so I sprayed them with some "apparently" plant friendly, organic pesticide. I only sprayed 4 of 8 and it is only those 4 that seem to have the problem.
More so why I come to this conclusion is that all of my plants are getting the same quantity nutrients so if any would have adverse effects to the nutrients it would be my younger ones (I have some that are 4 days behind the ones with the problem). Most of my younger ones are fine and it is only the older ones that I sprayed with this bug spray..
New growth formed today through the burnt head, touch wood, seems ok thank god!
Will still be keeping an eye.
Thanks again!!!!!!
MaG