Two weeks ago, I started some stem butts in cardboard. They are doing well, I think in another week I will be adding more cardboard. By this spring, I hope to have at least 12 good-sized colonies (a pound or so each), and I am mulling how I will continue to grow them outside.
maybe nobody's tried it, though that would surprise me. I may just have to try and risk screwing it all up to find out for myself. at the worst, I'll still have a lot of material for a compost pile.
If you're trying to grow them outside, I'd spread the grounds out rather than pile them deep, as they would be in a barrel. Inside, I think I'd try a container that was flattish. Although, here's some things I found that look intriguing -
http://www.mushroommountain.com/grow_your_own/home_cultivation.asp (blewit bomb at bottom of page)
In my experience, a deep pile of coffee grounds grows mold.
K. B. wrote:a perforated pipe down the center of the barrel may work to keep the substrate from running too low on O2 (similar to aerating a compost pile). A polyethylene tube (sleeve) ~1' thick filled with pre-sterilized coffee grounds may be better than a barrel. Hanging sleeves about 8' long from the ceiling are pretty cool
the big advantage of using plastic barrels is that I've already got a few lying around. I was thinking of doing something similar to the pipe in the center, or maybe several pipes distributed through the barrel. or perforating the barrel itself. or some combination thereof.
the polyethylene sleeve sounds fun, but I'm sort of shooting for not buying more stuff for this. I've got some spawn to start the whole thing, the coffee grounds are free, there's enough rubbish hanging around that I ought to be ale to cobble something functional together. if I happen to come across anything like that for free, though, I'll give it a shot.
I've also got a fair number of burlap bags that I'll try out. I'll try spreading mycelium onto the bags, then adding coffee grounds. I'll try adding previously colonized coffee grounds to the bags. I've got enough to try it a few different ways.
any other ideas for medium-scale cultivation on coffee grounds are very much welcome. I'm really excited about this project and impatient for it to really get going. I wish I had started a year ago. or five years ago.
There is certainly no harm in experimenting, though.
jacque greenleaf wrote:Hmmm. This brings up something I've been mentally kicking around. I've noticed that most teks direct you to grow and fruit mushrooms on a homogeneous substrate. If you had a pound or so of vigorously running spawn of an aggressive nature like oysters, couldn't you mix substrates in your next step up? In this instance, I am wondering about mixing corrugated cardboard, coffee grounds and straw. Straw and cardboard would help the grounds stay aerated.
I like this idea. been thinking similarly myself. I've already started with the cardboard, and I've got quite a bit of straw around, too. I'll add this to the list of variations to try out.