How to Make Agar

Supplies List

  • 750ml Glass Bottle
  • 15g Agar Agar
  • 15g Malt Extract
  • 1.5g Nutritional Yeast
  • Pressure Cooker
  • Aluminum Foil
  • Funnel
  • Mason Jars
  • 25 Petri dishes
  • Parafilm


Click a timestamp to jump to that section of video.

00:15 STEP 1:
Mix 15g Agar Agar, 15g Malt Extract, and 1.5g Nutritional Yeast with 3 cups of warm water in your 750ml bottle.
01:11 STEP 2:
Then add an aluminum foil topper for ventilation.
01:17 STEP 3:
Next, place your 750ml bottle in the pressure cooker and fill water to the level of agar in the bottle. (I use mason jars for braces in the pressure cooker.)
01:52 STEP 4:
Sterilize the agar at 15 PSI for 45 min.
02:18 STEP 5:
Then let cool just enough to be able to handle and move into a sterile environment and pour agar in petri dishes from the top to the bottom.
03:14 STEP 6:
Wait for them to cool and wrap with parafilm.

Mushroom, Mycelium, Petri Dish Time-Lapse Compilation

In this video you will see a mushroom, mycelium, petri dish time-lapse compilation.

How to Grow Mushrooms from Start to Finish in a Monotub

In this video I show you how to grow mushrooms from start to finish in a monotub.

How to grow mushrooms in a monotub

In this video I show you how to grow mushrooms in a monotub with a liner.