Q.Red clay mud
My front yard is full shade and my soil is red clay mud. Double whammy! I have used gardening soil in the holes when planting flowers but everything dies. Rots actually from the shady dampness is my guess. Is there anything besides (along with) gardening soil that I can put in the hole that might help?
Many Thanks. Donna

Sure, there are several things you can do to improve your soil condition. Keep in mind it takes time! These articles may help you:
https://www.gardeningknowhow.com/special/organic/how-to-easily-improve-your-clay-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm