Hi, 
It is a little hard to comment without a picture but you may have burned the plant with too much fertilizing.  Miracle gro, in some formulations, is very high in nitrogen.  A slow release,  once a season is almost always enough.
Leave the plant be.  Keep it watered. In the spring cut back stuff that is clearly dead, wait for life. 
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-fertilizer-burn.htm
Thank you for writing.

Thank you for writing back. 
That is a seriously damaged plant.  What is underneath the rocks? Garden fabric?  
Let me know, I have two thoughts but cannot decide without knowing. 

Thank you for the additional information.  
Here is what happened. My guess is that you pulled the tarp away roughly to the size of the rootball. You assumed downward water.  There are several kinds of landscaping tarp. Some are highly permeable to water.  Some not so much. This was probably relatively impermeable, perhaps even doubled. Normally, much of the water comes lateral to the plant, saturating from out side the rootball inward to the rootball. This did not happen in your situation. 

Meanwhile, the nitrogen was stimulating the plant to grow and the plant could not draw water from surrounding soil.  It dried up.  
I doubt that this plant can be saved.  You could leave it in until spring and see what happens.