I also live in the Northwest and I grow Lion's Mane (
Hericium erinaceus) on California black oak logs. I used plug spawn from Field and Forest Products in Wisconsin, my favorite mushroom spawn company. Field and Forest says that hardwood logs are best for Lion's Mane, including red oak, beech, sugar maple, tulip poplar, aspen, sweetgum and soft maples. They also sell Comb Tooth (
Hericium americanum) spawn as well and they recommend beech and sugar maple for this species. They do not mention any suitable conifers for either species. I doubt Hawthorne would work, but you never know...
Another company from Ohio sells spawn for what they call the Conifer Coral mushroom (
Hericium abietis):
http://themushroompatch.com/plugs.htm
They claim this species of Hericium will grow on conifers, including pine. My NW mushroom field guide states that
H. abietis is found on hemlock and fir, meaning true firs of the
Abies genus. I have seen this mushroom on true firs in the Cascade range and Siskiyous, but in over thirty years of mushroom hunting, never have I seen it on Douglas-fir. That being said, I would also like to find a strain of Lion's Mane that will grow on Douglas-fir logs, since I have tons of Douglas-fir on my property and very few true firs. But I have no experience with The MushroomPatch company- not even sure if they still sell spawn.
My guess is that it would be easiest for you to grow
H. ericaceus from plug spawn from F & F on oak logs that are fresh and clean- maybe you could get a permit from the Forest Service to harvest a few oak log branches and inoculate those if you have no oak on your property. Good luck!