I asked this under a different section probaly should have posted it here.
A neighbor uses green grass looking indoor outdoor carpeting in as a weed barrier/walkway in her greenhouse. For the last two years at seasons end she removes the carpet for cleaning and has had truffles growing under where the carpet covered the ground. They don't grow anywhere else in the greenhouse just under the carpet. Has anyone heard of this before? The walkways are comprised of the pumice pine duff that is common here.
"There is enough in the world for everyones needs, but not enough for everyones greed"