Wow, an OFFICIAL grow. It does appear you have some sort of problem but I'm not a soil grower so can't really say what it is....perhaps ph lockout? That's what I would be thinking if those plants were in my hydro setup.

Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com

Here's a good link to check through....hope it helps you pinpoint the problem.