At DoubleBlind, we’ve taught thousands of people around the world how to grow mushrooms at-home. Now, we’re empowering you to go deep into the mushroom growing process. This course is specially designed for folks who have tried growing mushrooms before (with our 101 course or on their own)—and newbies who are ready to dive straight into the mycology deep end. You'll learn how to create your own library of mushroom genetics so that you never have to rely on a spore supplier again. (There’s nothing worse than waiting for a syringe in the mail only to find out it’s contaminated!) 

Written and taught by mycologists Dr. K Mandrake of The Psilocybin Mushroom Bible, Darren Springer, and Caine Barlow, this course will cover different types of grain spawn, the pros and cons of varying bulk substrates, how to build several kinds of fruiting chambers, how to take spore prints, and much more. Whether you’re a mushroom nerd—or just know the basics, this course will not only leave you with bigger and better yields—it will leave you feeling like you truly understand the mushroom growing process. 

Course Details:

Price: $159.99

Now open!

All the proceeds from this course go directly back to funding DoubleBlind's independent journalism. Email [email protected] for info on our scholarship program

What's Included:

5 video lessons

Step-by-step written instructions and FAQ guides 

Live access to experts

Access to a private forum of more than 700 growers

Why this class?

We're Trusted
At DoubleBlind, we've taught thousands of people how to successfully grow mushrooms right at home. It's been a humbling and beautiful journey.

One-on-One Support
Unlike with online forums like Reddit, with our course, you get access to leading mycology teachers who will support you every step of the way, by looking at photos of your grow, answering your questions, helping you troubleshoot, and just cheering you on. Our team includes three teachers and five TAs who are available Monday through Friday in our private community forum.

Take Control of Your Supply
In our beginners mushroom course, we teach you how to grow mushrooms in nine weeks with a spore syringe. In this course, we'll teach you how to do liquid culture and make agar plates. You'll never need to buy spores from an online retailer again—and you'll have an infinite supply of shrooms for yourself, friends, and family. Plus, your chances of contamination (the biggest reason people fail at growing) go way down.

Save Time
When growing for the first time, you can waste a lot of time and resources trying to get it right. Armed with this intermediate knowledge, you'll be better at spotting and managing contamination early so your chances of success go up. 

Save Money
Grow more mushies, for less money. Once you know these more intermediate teks, you'll be able to get a lot more bang for your buck.

Deepen Your Relationship with Mushrooms
There's nothing more beautiful than connecting with what you put in your own body. This course will give you a deeper understanding of how mycelium grow and why people choose varying teks. You won't just be following steps, but be making your own choices about how to optimize your set up. 

Grow Many Kinds of Mushrooms
Not all mushrooms grow the same way. In this course, we'll empower you to move beyond shrooms that grow on rice, to all kinds of species including wood-loving ones like Lion's Mane and Reishi that are incredible for your health and cooking. 

Join the Grow Your Own Movement
There’s a movement on the rise. People are taking control of their wellness. Join us and become a part of it.

Support Independent Journalism
The proceeds from this course fund DoubleBlind’s journalism, to help us pay the writers, photographers, and artists who put our magazine together.

What you'll get:

  • Five classes taught by mycologists Dr. K Mandrake, Caine Barlow, and Darren Springer, where they'll explain the fundamentals of each tek and then offer easy-to-follow demonstrations. You can watch the recordings as many times as you like

  • Support from mycology experts on the DoubleBlind team to help make the preparation and cultivation process as seamless as possible.

  • Access to an invite-only, private DoubleBlind community to bond with and receive support from your fellow growers.

  • A supplies list with our favorite products and a written companion to the video course, to answer additional questions for maximum clarity and education.

  • A guide to answer other Frequently Asked Questions.

What you'll learn:

This expert-curated course empowers you to take your mushroom growing to the next level, from grain substrates and fruiting chambers to making agar plates.

Episode 1: Liquid Culture (with Caine Barlow)
Liquid Culture, or LC, is a cheaper and faster way to grow mushrooms than spore syringes. Plus, it's an easy way to introduce mycelium to grain in bulkit makes for great storage of fungi cultures, and it allows you to share or trade mycelium with friends and family. In this episode, you'll learn how to prepare liquid culture, how to make a magnetic stirrer, how to make airport lids, care and maintenance of your LC, and more. 

Episode 2: Grain Spawn (with Caine Barlow)
Grain spawn for mycologists is kind of like meatballs for grandmas. Everyone has a recipe—and there's a lot of strong feelings about the best one. But what actually are the best ingredients for growing your mushrooms? In this episode, we don't tell you: we empower you to make your own choice and to play around until you find what works best. We cover rye berries, wheat berries, millet, sorghum, corn, wild bird seed, and wood chips (for wood-loving species). We also cover different kinds of spawn containers (glass jars vs. polypropylene bags), and how to take care of your grain spawn to avoid contamination and mold. 

Episode 3: Fruiting Chambers (with Darren Springer)
Your fruiting chamber is your home for your mushrooms. Like grain spawns, there's many different kinds—and they all have pros and cons, depending on whether your priority is ease, cost, growing in bulk, or something else. In this episode, Darren Springer covers the difference between the shotgun fruiting chamber and the monotub, and how to make both. He also reviews Martha's Closet, a more advanced tek, and why you might opt for that once you graduate to the next level of growing.

Episode 4: Designing Bulk Substrates (with Darren Springer)
There's also many different recipes for bulk substrates—or the final medium (like soil) that your mushrooms grow in before they're ready for harvest. We always get a lot of questions about this step in our 101 course. Folks read online that it's good to add manure, coffee, and other ingredients. In this episode, we'll help you navigate the complicated world of substrate ingredients and brands including coir, manure (horse, cow, chicken and more), straw, and worm castings. 

Episode 5: Spore Prints, Agar, and Maintaining Culture Libraries (with Dr. K Mandrake)
In the final episode, we’ll cover how to keep your mushroom cultures going for years to come. Although we’ve experimented with a variety of different species, we still have original culture lines from our first syringes over 10 years ago. Through making spore prints and cloning on agar, you can keep sources of spores available for whenever you need them, as well as isolate the genetics of interesting wild, store-bought, or home-grown species. You'll end the class knowing how to take a spore print, how to make a spore syringe, agar recipes and how to make plates, how to isolate clean healthy cultures (even when your spores might have contamination), how to clone mushrooms to preserve genetics indefinitely, and tips for building a culture library, including long-term storage techniques. 

You'll also learn best practices for:

  • Avoiding Contamination

  • Buying (and Saving Money on) Supplies

  • How to Scale Your Grow Up or Down in Size

  • How to Share and Trade Mycelium with Other Growers

Our Mushroom Community Says:

"My favorite part of the course is the mix of different experts!"

- *Kathy (DB 101 Student)

"My favorite part of the course is the mix of different experts! They were all super nice and each had different perspectives. It felt a lot more like a community instantly going in, with it not just being a "one teacher" situation. I also just loved getting to interact with all the other growers. It was cool to see people from so many different places and for us to support each other with positive comments."

"I am super thankful for DoubleBlind, the mycologists, and the students! What an amazing experience :)"

- Jon, Therapist, California

"The community forum was extremely helpful. I also enjoyed the Q&A's and access to the mycologists. Their info/insight was extremely valuable. I loved it and I am super thankful for DoubleBlind, the mycologists, and the students! what an amazing experience :) "

"A healthier alternative"

Ophelia Chong, Founder of Mogu.Care

"Learning to grow your own medicine is even more important now, we are seeing supply chains fail and change, we are seeing changes in how we think of pharmaceuticals in our daily lives and these events have us rejecting the chemical for the organic. These videos will help you understand fungi and if you practice, you will be able to choose and provide a healthier alternative to OTC products and Pharma."

"Thank you so much for this! It was exactly what I needed when I needed it."

- Rebecca H., artist and domestic worker, Oakland

"Thank you so much for this! It was exactly what I needed when I needed it. I’m a total novice to this world. I’ve been doing a lot of research about therapy to treat my OCD and PTSD and it’s so easy to get lost on Reddit and Shroomery. I have several mushroom growing books, but they’re just too technical for me. The DoubleBlind community seems so chill. I love it all and I’m becoming a psychedelic fan (even though I still haven’t ever tripped!)."

"The course was hugely effective...I credited the tek and clear guidance from the staff"

- Rod Johnson, 76 year old retired Foreign Service officer now living in Northern Virginia (DB 101 student)

"I think [the course] was hugely effective. I got a somewhat slow start but have harvested well over a kilo of mushrooms from the first flush of my grow with more to come. I credit the tek and the clear guidance from the staff."

Frequently Asked Questions:

  • How do I access the materials for the course?

    Once you buy the course, all the materials can be accessed with a username and log-in through our website. There’s five episodes and accompanying PDFs to make it easy for you to follow along. We’ll also invite you to our private community forum where you'll have access to our mycology team and your fellow growers, to support you as any questions come up.

  • When does the course begin?

    You can start it anytime and move along at your own pace.

  • What happens when I complete an episode? Can I watch it again?

    Yes, you can watch each episode as many times as you'd like.

  • Is this course for me?

    This course is designed for newbies and people who have tried basic mushroom growing before (i.e. with the PF or Spiderman tek) and now want to learn some new teks. We recommend that if you have never grown mushrooms before that you start with our DB 101 course. (You can purchase this one and that one at a discount if you bundle them together.) This will help give you a foundation and increase your chances of success. That said, if you want to dive straight into the mycology deep end with this intermediate course, we've designed the curriculum so that you can.

  • What if the course is too difficult?

    Once you subscribe, you will have access to a community of experts who will be available to personally answer your questions.

  • Still have questions?

    Email us at [email protected]

Meet Our Mycology Team

Together, our teachers have more than five decades of experience growing mushrooms and have taught thousands of people how to grow, too.

Dr. K Mandrake

Course Instructor & Expert Support

If you’ve done any poking around on the internet about growing psilocybin, you’ve probably encountered Dr. K Mandrake’s work. At DoubleBlind, we call him Dr. K or just K, for short, and we are absolutely, positively humbled to have him as a member of our team. He and Virginia Haze (one of our other live support experts) wrote the definitive psychedelic mushroom growing book, The Psilocybin Mushroom Bible. He holds a doctorate in mycology and is an expert on every stage of the grow process, whether you’re a beginner or looking for more advanced techniques.

Caine Barlow

Course Instructor

Caine Barlow is a Mycologist and Fungi Educator based in Melbourne, Australia. He gives regular talks on mycology, fungi conservation and teaches gourmet mushroom cultivation. He is member of the Australian organisations Entheogenesis Australis, The Australian Psychedelic Society, and MYCOmmunity Applied Mycology. He is a “Trusted Identifier” on The Shroomery and a moderator on many Australian facebook fungi groups.

Darren Springer

Course Instructor

Darren Springer is a keen mushroom grower and teacher who has taught over a thousand people in the last seven years how to grow their own edible mushrooms. He is a grassroots researcher and event organizer based in London, the Director of Ancient Future, the Convenor of the Psychedelia Railway Gatherings and curator at Earth Tone Arts and a member of the Breaking Convention committee. After setting up Ancient Future in 2006, a voluntary organisation, he has continued to develop workshops and projects geared around creative arts, personal development and ancient spiritual systems in his community. Until recently, he used to be an organic horticulture, permaculture and food enterprise tutor at Organiclea.

Virginia Haze

Expert Support

Virginia Haze is a nomadic writer and editor with a long history of both writing about and using intoxicants in all their forms, though not always at the same time. She’s written for drug culture magazines, worked on many step-by-step cultivation guides and learned to grow mushrooms under the expert tutelage of Dr. K Mandrake.


Expert Support

Bryan has been working with our fungatic friends (he made that word up) off and on for four years, a process he has found fascinating and very, very weird. He likes small grows so he can try out several different methods and species at once. Right now, for example, he’s working on a plastic-free tek he hopes to unveil to our DB growing community. In his other life, Bryan is a philosopher. At eleven years old, he told his parents this is what he wanted to be and they responded that this is not an occupation you choose; it’s one that falls in your lap. So he ditched the idea, only to discover that, lo and behold, they were right: It happened by accident! Bryan thinks mushrooms are very philosophical and he’s very grateful to be part of the wonderful DB teaching team.

Ophelia Chong

Expert Support

At DoubleBlind, we jokingly called Ophelia Chong our “mushroom mom.” She brings as much spirit and fun to our mushroom course as she does expertise. At her home, she grows dozens of kinds of mushrooms, from oysters to reishi and beyond. She’s a true hobbyist who, not long ago, was like our mushroom 101 students, building her first grow. It’s for this reason that she is so passionate about supporting our growers in our live community forum. Whether you can’t find the right substrate or you want to try experimenting with something totally wild, she’s your gal.

Check Out Our Community's Grows!

Let's Grow!

Deepen your relationship with your mushrooms