Quote Originally Posted by mka322
do you think it might be the soil ph?
Yes, I absolutely do. Do you have any idea what your nutrients are going in at, or what runoff is? Those 2 will give you a good idea of what's going on in your container.

Did you purchase this mix or did you make it? If you made it, what exactly is in it?

Don't feed anymore until you know what's going on. If you keep adding salts to the soil, it can get past the point of no return.

Yellowing of lower leaves is normal but not until late in flower. If it's happening in veg this early, something is wrong in your soil.

I would flush the container with properly pH'd water, and then let it completely dry before even watering again. The flush will push some of the nutes out of the soil and hopefully bring your pH back into range.

Also, fill out a troubleshooting form. It'll help us diagnose more specifically what is wrong.