Not the Karl Orff wrote in message ...
I got my hands on a German gardening magazine that
suggested/demonstrated growing oyster mushrooms in coffee grounds.
Can't read the german but would getting an oyster mushroom and letting
it rot (or shaking it over the grounds) be sufficient to get some spors
in?


www.fungi.com has an espresso oyster kit.

Also suggested/showed shiitakes grown from oak and someother hardwood
logs. We only have poplus or various confier woods handy here. Also a
matter of getting the shiitake spores.

poplar could be OK. Conifer is not, but fungi has specialized spawn
for conifers.
Whatever you do, make sure that shade and moisture are OK. Most
mushrooms, even in logs or woodchips, will like a source of nitrogen
(such as coffee grounds or manure) to cover them until they reach
maturity. In fact, I use the espresso kit in a woodchip-coffee
mixture.