26/06/2026
One of the ways we keep things circular at FungiTown is by giving our old mushroom blocks a second life. ♻️
Once they’ve finished producing mushrooms, they’re known as ‘spent mushroom substrate’. Even though they won’t grow another crop, they’re still packed with organic matter, nutrients, beneficial microbes, and mycelium.
Instead of throwing them away, we put them back into the Earth where their next chapter begins.
They can be used to:
🌱 Improving soil health
💧 Help the ground hold onto moisture
🦠 Support beneficial soil life
🍄 Add fungal biomass back into the ecosystem
♻️ Return nutrients to the land
You can use spent substrate in compost, around trees as mulch, in vermicomposting systems, as livestock bedding, and even in land restoration projects.
Have you ever used spent mushroom substrate in your garden? Let us know below!
And if you’d like some for your own garden or compost, send us a DM. We’d love to help it find its next home. 💚
❤️
