Update

Ok so something is wrong and not due to ordinary plant growth.

Many more leaves are turning yellow, withering and dying.

I have no idea what is causing it but took several pictures. They leaves seem to get patches that are withering with the whole leaf eventually turning pale yellow then more brown before drooping and either becoming a soggy texture or crispy dry.

The only thing i can think of would be a problem with the soil used for thier transplant. None of the plants were showing any problems beforehand and all are now showing yellowing to getter of lesser degrees.

Please help! I don't want to lose all of my first grow.