Mushroom manure


Former Moderator
Who uses it? Normally we use Penn Mulch to cover our seed, but the place was out. The guy says use mushroom manure. This is the fastest germination we have had on a slower germinating seed. It was up in 4 days.
Anyone else covering their seed with mushroom manure?


LawnSite Silver Member
S.E. Michigan
Nope. I didn't know mushrooms could poop. :D


LawnSite Bronze Member
They can't poop but it is not uncommon for them to be grown in manure . They also thrive on dead and decaying matter. When you see them coming up in a lawn they usually are feeding on dead root material.

I am just guessing about Mushroom Manure but I would say this is manure in which mushrooms will thrive.



LawnSite Member
Pottstown, PA
You just topdressed the seed with the compost also known as, spent mushroom substrate. I have been researching using this form my yard and was going to incorporate this stuff into my soil as an amendment, $19/ cu. yd near me. From what I have seen it is great stuff and is steam pasteurized to kill pathogens and seed after being taken out of the mushroom houses.

I might have to try using this on top instead of straw. I'll let you know how I make out.

Here is a good article.


LawnSite Fanatic
zone 7 CA
Be careful using it for topping seed.It must be very well aged before using.I'm sure you looked at it and determined that it was.
Here ya gotta be careful because we get it "Hot" and steaming sometimes.When it is like that or smells really strong... age it before use .
Even aged Mushroom compost will produce mushrooms sometimes and when "Hot" it is still full of salts that need to be leached out.
I use it as a soil amendment/planting mix when I plant and also when installing new beds and lawns and when renovating beds and lawns.Other words I have used it mixed in the soil and not on top of the soil or on top of seed.
I can imagine you would get fast germination because it is full of all kinds of good stuff for the soil to eat.