The confer I have got is cypress I think I saw some gum chunks at the side of the road I could pick up, they are recently cut, but I have no spawn at the moment. I did a fair bit of reading so far (Stammets) and he suggests one method were you use the spores of an older mushroom and the other were you use the lower part which is usually thrown away to grow your spawn. Since I'm not good at searching wild mushrooms, I would like to begin with shop bought ones. So you think these methods work with shop bought mushrooms too? And then there is a second problem: you begin to grow your spawn and that needs time . Either you first got your wood, but until the spawn is ready you wood might be to old or you risk you don't get wood at all. At the moment I could get a lot of gum trees (eucalypt) or pine. Straw is too expensive here and there is no way I would know how it's treated. But I have got a pile of fresh wood chips too.