[Pollard]

Morels are a famously difficult mushroom species to cultivate but are great for experimenting with new methods. Given their difficulty, we do not currently recommend for commercial use. (Please let us know of your successes and failures when trying to cultivate this species!) We recommend using this experimental spawn in outdoor beds, forest floor inoculations, or utilizing burned substrates. Morel mushrooms do not grow on logs.

https://northspore.com/products/morel-sawdust-spawn

Most everything I find says they're very tree specific and like Ash and Elm. A burned area is also helpful. My neighbor's hot spot is around a big dead elm tree but I don't know if the spot has ever burned.

I'll stick with the easy ones, shiitake and red wine cap.

[Pete from Shawnee Mission]

Ask and Embla, Ash and Elm; The first man and woman in the Viking Creation myth.

Dying elms are good place to look. I do not now if that applies to Siberian elms which are really crappy trees that grow fast and were used a lot in the street plantings around here.

Good luck with your Shitake!