Q.I Tried To Use Planting Bag But Had Little Luck, Can I Use The Soil From The Bags In Regular Pots Or Must I Dump The Soil?
I am new at gardening but have had some success with vegetables in my raised garden but trying to grow anything in the bags did not work. I am trying to plant flowers and I have many grow bags filled with soil. I hate to waste the soil. Should I just forget about keeping the soil?

Certified GKH Gardening Expert
As long as your plants did not die of a disease that will spread to others, then it will be fine to use this soil again. If the soil caught a disease that can be spread to other, similar, plants then don't.
If it did catch a disease, you might think about composting the soil:
https://www.gardeningknowhow.com/composting/basics