Spent mushroom substrate.

[Billygoat]

Saw this on a local group. Any use in a soil mix?

 

[Goonie Goat]

Saw this on a local group. Any use in a soil mix?

Yeah for sure. Even better if it's contaminated with trichoderma https://www.nature.com/articles/s41579-022-00819-5

 

[itchybro]

prob wouldn't use it in a soil mix amendment but could be good as a carbon source in a compost pile