DTE sprayed a retaining wall of mine that I am trying to cover with ivy.
I don't know how to clean this and ready the soil at the base and behind the wall for the ivy.
Plants near the oily residue grow but when they hit the residue they die.
Washtenaw County Michigan soil
What did DTE spray on the retaining wall?
DTE has been out. It turns out that a transformer leaked some substance on the wall.
Thanks for the response. I will find out what the substance was from DTE.