Hi Angela,
Apologies for the slow response – for some reason we haven’t been receiving notifications of new forum posts.
Although we have never tried growing with grounds from cold pressed coffee, my initial thoughts are that they would not be so good for growing mushrooms on. During the soaking time, any resident mould spores will become hydrated and may begin to germinate – actually increasing the speed at which they then grow on the coffee once bagged up alongside the spawn.
The pastuerisation by heat is really important as it is the point at which most mould spores will be killed off.
Having said that, you never really know until you give it a go, so don’t be put off just yet! Maybe just try a few bags like this and see how they get on. Let us know how it goes!
best wishes,
Adam
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