King Stropharia in peatmoss

Im growing blueberries and strawberries in 55 gallon sub irrigated planters full of peat/topsoil.
Im mostly fertilizing with with urine so far, but I plan to topdress with compost.
I also intend to add red wrigglers.
King Stropharia is said to trap and devour nematodes that can plague strawberry plants.
Peatmoss is usually mentioned in relationship to mushrooms as a "casing" ,a layer that helps retain moisture and promote fruiting.
It is said to be virtually nutrient free.
I would like to add King Stropharia spawn to my barrels.
Would my top dressing and be sufficient to feed the shroons?
Should I add something else?
Corn gluten comes to mind.With known allopathic effects and a huge nitrogen boost, it might be perfect.
Alfalfa pellets or cubes might work in a similar way.
Fruiting of the King Stropharia would be great, but keeping the mycilium alive and fed is the goal.
Any suggestions for other perennial acid loving food plants are welcome.

My cousin grew these on the ground, nothing special, with a coat of wood chips (doug fir, maple, mix generally along those lines). In the wood chips, the King innoculant is mixed in, the chips should be fairly fresh. The wood chips were her garden paths, and the Kings did great. The soil was low nutrient, high acid. Good luck!