How to Make Super Nutrient Agar Plates for Mycology. North Spore This recipe for super nutrient agar plates is great for propagating mushroom mycelium. Combining honey, light malt extract and potato water makes for a power house of nutrients. I use different agar formulations from time to time to keep the mycelium from getting bored of the same old food. So if I have mycelium that seems to have slowed down, I transfer it to this high nutrient agar to rejuvenate. Recipe for 1 liter of super nutri