She is not dying bro, but from the looks of the soil it appears you are going too long in between feedings/waterings. Never ever ever let promix dry out. It will cause havoc on the ph. I have grown with promix from day one and always water a little earlier than suggested. If the top of the soil gets a crust, it is too long. Yes, it looks like she could use a feeding. Also, on your next grow, give her more soil in the container, that one is way too empty. A little more root space in there and she would have been bigger.
What are your temps in there? You said it was an oven? If it is above 85 or so, she will be transpiring too much to take up nutrients properly. You may need to add a small fan to draw some cool air through there.
Best of luck bro! Some grow karma sent your way.