Grow mushrooms on old Digi-Key catalogs

Grow mushrooms on old Digi-Key catalogs via BB.

Making DIY gourmet mushrooms at home is difficult: you must buy a bale of hay, and must innoculate some sterile grain as “spawn.” That, or buy a pre-made “grow block” from a supplier. Instead, what if we use old phone books as the growth medium? Don’t throw out those Mouser and Digikey electronics catalogs, instead turn them into mushrooms. Pleurotus ostreatus (oyster mushrooms) is an easy one.

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 35,000+ makers on Adafruit’s Discord channels and be part of the community!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more

CircuitPython – The easiest way to program microcontrollers –

Maker Business — Chip inventories rise as demand falls

Wearables — How to attach a battery to your next wearables project

Electronics — Check out this shorthand shortcut

Python for Microcontrollers — Python on Microcontrollers Newsletter: 400 CircuitPython Libraries, 3m Thanks and much more! #CircuitPython #Python @ThePSF @micropython @Raspberry_Pi

Adafruit IoT Monthly — 2022 in Recap!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProducts 1/25/23 Featuring #Adafruit ESP32-S2 Reverse #TFT Feather! @adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at !


  1. Interesting idea, I felt a bit let down when I realised there wasn’t going to be a “here are some I prepared earlier!” section to the video!

    If you notice anyone follow his idea, please post it!

  2. i thought about using catalogs as enclosures

    cut out the middle and use a lot of glue

  3. Best patent that idea before another thousand people do it instead. Then you can extort sums of money from everyone else.

  4. A word of caution: some print processes use heavy metal drying agents in the ink. It’s possible that those could be picked up by anything growing in the paper.

    It might be a good idea to have a batch of mushrooms tested before anyone eats them, because mercury and/or lead poisoning sucks.

  5. Mike Stone is right. The ink used in these rotary printing processes is dangerous stuff. And mushrooms are notoriously known to their tendency to accumulate heavy metals and other toxic stuff. Thats why they are used as an indicator of cleanness of environment. i.e. in Eastern Europe after Chernobyl all the mushrooms were radioactive 🙂

  6. It has been done before actually, I saw, on some one grow psilocybe cubensis mushrooms on a bible, although those mushrooms are not “gourmet mushrooms” in the classical sense 🙂

Sorry, the comment form is closed at this time.