Too much nitrogen usually makes the leaves look very dark green. The color on my screen may be off but it looks like a good shade to me?
If it's a very dark green flush your soil and only use water until she starts to lighten up a bit. She will feed off the excess N in her leaves.
what is the air circulation like across the canopy?
plants cannot breathe in still air, disregard if im way off.
looks a lot like an abundance of N , ph checked?
and if its time release ferts in the miracle grow that will cause lots of problems likely.
I transplanted it today, Will update in the next few hours/days and let you all know how its going.