You mean the sticky gritty reddish orange clay like this?
![P1010580.jpg](/data/attachments/1872/1872127-97ef599c2e0fcb4a2781743b8bded277.jpg)
Why not just leave the bag out of it and fill a hole with good top soil or whatever you'd like to use? Roots can grow places you wouldn't expect them to grow. We have that rock hard clay you're probably talking about here and it will be a good deal of work to turn it, but I mixed in some vermiculite, worm castings, and top soil in with that clay and the plants I have seem to be growing just fine. The N isn't as high in the clay as it is in compost or other soils, but you can always add some Jack's Classic or other favored fertilizer to the soil or the water and it will be more than enough. Plants purpose in life is to grow and reproduce. You don't have to fight them, just give them what they need and you'll be surprised at how great they grow.
Feel free to do what you want to do, I'm just saying that in my experience the more you do to help a plant, the more problems you will encounter.