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Growing edible mushrooms from used coffee grounds

Okay, so you've mastered vegetable gardening so now it's time to learn to grow mushrooms. Mushrooms have many health benefits and can be grown in very cold weather so it's a valuable skill to learn.

I've been researching how to grow them for over a year and put created a 3 part series on YouTube to teach what I know. I basically bought about $1 worth of oyster mushrooms from the store and was able to grow mushrooms by using old coffee grounds and straw. Very cheap to try it and a great prepping skill.

I put all the videos/photos and more information on my blog: http://www.tomorrowsgarden.net/content/how-grow-mushrooms-home

It's very rewarding and hope some of you try it.

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love seeing stuff like this

Oyster fungi are such an easy species to grow, on almost any substrate. Straw&coffee, tree mulch, cardboard and paper, clothing, almost anything you can imagine. Good to see the fungi love. Got a few oyster cultures myself at the moment...

You sir just gave me the itch to pc up some agar... thanks!!!

Also. Pastrurization is Key with oysters once spawning to substrate. Never go with sterile after adding grain spawn.

This is so cool.

Mushrooms are reasonably high in protein, right? It would be a good way to get protein in lean times with nothing but a bit of used coffee and some straw!

I mean this is a good skill to have and hone.

Have you tried Shiitake mushrooms?


This is from the Urban Farmer Guys. This process seems simple, but they use plugs.
How hot is too hot for an inoculated log?

Very good videos, I enjoyed watching.

I think this would be interesting to give this a try. I should have all the straw i need free in my barn.

I would think putting the moistened straw in an oven for an hour would be much easier than boiling all that water.

I always thought mushrooms liked dark rooms not light. Are there different varieties that like darkness?

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Can anyone briefly list

the health/dietary benefits? Or, perhaps, would someone be able to provide a link or two to some reading material?

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For shiitakes...

Health Facts about Shiitakes
Shiitakes are 18% protein. They are a great source of B vitamins and contain all the essential amino acids. These mushrooms also contain interferon, beta glucans, and have long been recognized in Asian medicine for their ability to enhance the immune system as a general tonic.

In western medicine, various extracts of shiitakes—most recently AHCC—have been used to treat cancer, HIV, chronic fatigue syndrome, and other diseases. David Williams, M.D., calls AHCC "cancer's natural enemy" and describes it as one of the leading prescription treatments for cancer in Japan.
Andrew Weil, M.D., author of Natural Health, Natural Medicine, recommends eating shiitake mushrooms for cancer prevention, menopause, chronic fatigue syndrome, cholesterol problems, heart disease, breast cancer survivors, and to enhance the immune system.

From the website:http://www.shiitakes.com/Organic_Shittake_Mushrooms_About_Denison_TX.html

awesome to see this on DP

Stoked to see people starting to show some love for fungi around here! They are a powerful tool but very under appreciated. Anyone looking for mushroom growing supplies my company gives a discount for DPers - coupon code is dailypaul - subfarms.com

We grow mushrooms and sell them to local restaurants, but we also sell everything you need to do it yourself. We have pre-colonized mushroom kits, pasteurized substrate for growing high quality mushrooms, and even mushroom compost for gardening.

- Grow Mushrooms at Home


Do you have a tutorial for complete newbies?

Printersguy's system is intriguing because it uses odds and ends and leftover mushrooms.

The absolute easiest way to

The absolute easiest way to experience the process is our mushroom kits, which are pre-colonized oyster mushrooms ready to start producing mushrooms. Each kit is only $15, and will produce over 1 lb of mushrooms, and the leftover substrate is great for growing herbs & veggies.

We are working on a complete video tutorial but it isn't ready yet. This is the best place for info on growing fungi though:

Also this book is fantastic:

For a more hands on approach, we sell a kit of pre-sterilized grain, and our pasteurized mushroom growing substrate. We also have casing (to control pinset distribution) and individual additives for different mushroom types (straw, gypsum, vermiculite, coconut coir etc.)

- Grow Mushrooms at Home

My goal was to do it from store bought mushrooms for about $1

It works so there is no need to buy a kit. Spend 50 cents on a mushroom at the store and expand it!

no doubt

Don't get me wrong, I wish everyone would do this at home. It's a great way for people to get started.

We also used spent coffee and wheat straw for Oyster cultivation, but eventually had to switch. In our case, we grow for top end restaurants, so the devil is in the details. We've made a lot of tweaks over the years to give it some clear advantages. For example, the substrate we make now colonizes more aggressively, retains moisture much better, and produces big healthy mushrooms leaving a top quality mushroom compost for growing plants when you're finished.

You don't NEED to buy our substrate, but there are plenty of good reasons for choosing to.

- Grow Mushrooms at Home

Wow. Mind blown.

I have picked various mushrooms since I was quite young. I have lots of questions and haven't devoted the time to answer them for myself. Spores? How? Does it works for Chantrelles or Corals. Man, what a can of... mushrooms you have opened in this mans mind. Good on you.

this won't work for chanterelles

This only works for pure saprophytes (fungi that live off dead or decaying organic matter). Chanterelles are ectomycorrhyzal, which means they form symbiotic relationships with tree roots. AFAIK, no one has figured out yet how to cultivate them.

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Different varieties

This method works for oysters. Something like Shiitake likes wood. They all have their own preferences. The oysters I'm growing are grey and cold weather. When summer gets here I'll switch to golden oysters since they work well in warm weather.

Can you use boiling water to sanitize?

Or is the 90% alcohol a must have?

boiling water

You can boil the jars, that works. You will need alcohol for your hands, table top ect.

Is 90% a specialty?

Only 70% is sold usually. Do you use the alcohol because you have experience that it is needed?

I'm also a little daunted by chopping the straw. Is this to ensure that the straw pasteurizes evenly?

What is the advantage of using coffee cans over plastic bags?

Do all mushrooms need light or is this specific to oyster mushrooms?

I want to try this! Thanks for making the videos.

How many harvests?

Do the mushrooms grow back after they are picked?


They grow back 1-2 more times after picked

It depends on how much energy the mycelium has left. Average is 2 harvests.

thanks for the link

This is so cool. I bet those coffee ground are great compost after the fungi have broken them down some more. I forget - do you keep the cultures at room temperature?


You can do several jars and

You can do several jars and keep them in the fridge for many months and use as needed.


A local commercial mushroom grower sometimes lists used coffee grounds on Craigslist for garden use. At least, that's what they say! (I hear drug smugglers use coffee grounds, too.)

What do you think? http://consequeries.com/

Before I even watch it

you get an upvote for sharing this info!

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From what little research I have done..
I remember that a common/commercial approach
was boring out augured 'holes' in green timber logs
and placing the spore inside to nurture off the timber nutrients.
Something like that.. and was being promoted as start up ideas
for local industry by State depts in the S. Central U.S.
Lots of good info if you search it out.